The day has arrived:
AlphaRevX now includes support for the Desire S (HBOOT 0.98).
Hop on over to http://alpharev.nl/x/beta/
We'll use this as a support thread.
This version will also download and flash custom recovery if you want to, after getting S-OFF.
Note: the very first download missed some DLLs for the windows version, that should be included now.
Note2: There have been some reports (on dinc2) that the windows version might not always work like it should. Please report errors with that as descriptive as possible. The linux version should always work like it should.