Update README.md and other explainers based on 0.3 release

Author: lukewagner

README.md

@@ -13,8 +13,17 @@ reference interpreter and test suite.
 
 ## Milestones
 
-The Component Model is currently being incrementally developed and stabilized
-as part of [WASI Preview 2]. The subsequent [WASI Preview 3] milestone will be
+The Component Model is currently being incrementally developed as part of [WASI]
+"Developer Preview" releases. The features enabled by default in a Developer
+Preview release are kept stable so that they can be used outside the browser in
+production settings to collect feedback that informs subsequent iterations
+leading up to the standard 1.0 release.
+
+The current Developer Releases are:
+* 0.2: the initial release including ...
+* 0.3: adding ...
+
+The subsequent [WASI Preview 3] milestone will be
 primarily concerned with the addition of [async and thread support][Concurrency
 Model].
 
@@ -38,5 +47,4 @@ To contribute to any of these repositories, see the Community Group's
 [formal spec]: spec/
 [W3C WebAssembly Community Group]: https://www.w3.org/community/webassembly/
 [Contributing Guidelines]: https://webassembly.org/community/contributing/
-[WASI Preview 2]: https://github.com/WebAssembly/WASI/blob/main/docs/Preview2.md
-[WASI Preview 3]: https://github.com/WebAssembly/WASI/blob/main/docs/Preview2.md#looking-forward-to-preview-3
+[WASI]: https://github.com/webAssembly/wasi

design/mvp/Explainer.md

@@ -39,19 +39,27 @@ more user-focused explanation, take a look at the
   * [ESM-integration](#ESM-integration)
 * [Examples](#examples)
 
+(Based on the previous [scoping and layering] proposal to the WebAssembly CG,
+this repo merges and supersedes the [module-linking] and [interface-types]
+proposals, pushing some of their original features into the post-MVP [future
+feature](FutureFeatures.md) backlog.)
+
+
 ## Gated Features
 
 By default, the features described in this explainer (as well as the supporting
 [Binary.md](Binary.md), [WIT.md](WIT.md) and [CanonicalABI.md](CanonicalABI.md))
-have been implemented and are included in the [WASI Preview 2] stability
-milestone. Features that are not part of Preview 2 are demarcated by one of the
-emoji symbols listed below; these emojis will be removed once they are
-implemented, considered stable and included in a future milestone:
+have been implemented and are included in the [WASI] 0.2 Developer Preview
+release. The WASI 0.3 Developer Preview release additionally includes the
+features gated by 🔀.
+
+The other features, in various stages of implementation, polish and release, are
+gated by the following emojis and, when ready, may be included in subsequent
+WASI Developer Preview (minor) release:
 * 🪙: value imports/exports and component-level start function
 * 🪺: nested namespaces and packages in import/export names
-* 🔀: async
-  * 🚝: enabling more canonical ABI options on more async-related builtins
-  * 🚟: using `async` with `canon lift` without `callback` (stackful lift)
+* 🚝: enabling more canonical ABI options on more async-related builtins
+* 🚟: using `async` with `canon lift` without `callback` (stackful lift)
 * 🧵: threading built-ins
   * 🧵②: [shared-everything-threads]-based threading built-ins
 * 🔧: fixed-length lists
@@ -61,11 +69,6 @@ implemented, considered stable and included in a future milestone:
 * 🗺️: the `map` type
 * 🏷️: `implements` annotations for plain-named interface imports/exports
 
-(Based on the previous [scoping and layering] proposal to the WebAssembly CG,
-this repo merges and supersedes the [module-linking] and [interface-types]
-proposals, pushing some of their original features into the post-MVP [future
-feature](FutureFeatures.md) backlog.)
-
 
 ## Grammar
 
@@ -2945,7 +2948,7 @@ have a `canonversion`, and the concatenation of the `canonversion` and
 For compatibility with older versions of this spec, non-canonical
 `interfacename`s (with `interfaceversion`s matching any `valid semver`) are
 temporarily permitted. These non-canonical names may trigger warnings and will
-start being rejected some time after after [WASI Preview 3] is released.
+start being rejected at some point in the future.
 
 
 ## Component Invariants
@@ -3319,8 +3322,7 @@ For some use-case-focused, worked examples, see:
 [memory64]: https://github.com/webAssembly/memory64
 [`rectype`]: https://webassembly.github.io/gc/core/text/types.html#text-rectype
 [shared-everything-threads]: https://github.com/WebAssembly/shared-everything-threads
-[WASI Preview 2]: https://github.com/WebAssembly/WASI/tree/main/wasip2#readme
-[WASI Preview 3]: https://github.com/WebAssembly/WASI/tree/main/wasip2#looking-forward-to-preview-3
+[WASI]: https://github.com/webAssembly/wasi
 [reference types]: https://github.com/WebAssembly/reference-types/blob/master/proposals/reference-types/Overview.md
 [GC ABI Option]: https://github.com/WebAssembly/component-model/issues/525