pointer to msprime

README.md

@@ -4,5 +4,12 @@ The tree sequence toolkit
 **This repository is a placeholder, and currently only exists to ensure the 
   name isn't taken on PyPI.**
 
-We expect development to begin on tskit soon.
+Currently, the `tskit` tools are still bundled with the Python package [`msprime`](https://github.com/tskit-dev/msprime).
+We expect to separate the two soon,
+but to use `tskit` in the meantime, [install `msprime`](https://msprime.readthedocs.io/en/latest/installation.html),
+and then
+```
+import msprime as tskit
+```
+will get you the functionality that `tskit` will provide in the future.