When do I get Indigo and next Avalon?
According to the keynote by Eric Rudder at VSLive and
this page -- Microsoft will make a WinFX Community Tech Preview (CTP) available in March, which will include an Indigo CTP, a second Avalon CTP (following up on the first release in November), and a build of Visual Studio 2005.
The same page has a link to see Eric's session. You can also check out
Soma's session