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diff --git a/README b/README
index 822d1df..7e13c9a 100644
--- a/README
+++ b/README
@@ -70,3 +70,35 @@ Getting function exports...
     [cabi_realloc]
 Shutting down...
 Done.
+
+
+Component Model
+===============
+
+You can play with the component model under rust/hello_world
+
+This requires some new tools
+
+   - https://github.com/bytecodealliance/wit-bindgen
+   - https://github.com/bytecodealliance/wasm-tools
+
+ You can use the pre-built packages, once downloaded and untar'd, edit
+
+   rust/hello_world/component/Makefile
+
+ and adjust the paths for the above tools.
+
+ To build the component with make you may need to specify where the WASI
+ sysroot is
+
+   $ make WASI_SYSROOT=/path/to/wasi-sysroot
+
+You can then build the Rust runtime under rust/hello_world with
+
+  $ cargo build
+
+after a while (sheesh) it should finish... then you can run it with
+
+  $ target/debug/hello_world
+
+it won't actually print anything, but also shouldn't give an error.