Did you not see the other two similar 'PC' solutions?
Microsoft Expressions 4 encoder (XP, Vista, Seven) is probably the 'easiest' for popping a tuner on the sound card and broadcasting it out as you simply select 'live input', pick the sound card source, "cue," tick streaming-broadcast, and hit 'start'.
Winamp is a bit more complex (separate server, manually editing a config file, etc) but if you also want to stream local files I think it's media browser makes that simpler than Expressions because you can select directories and playlists vs 'files'. (Expressions seems more geared to broadcasting a 'prepared presentation'.)
One of the things I like about both of those, though, is neither requires 'signing in' to anything (although Winamp allows you to sign up to their shoutcast radio list if you'd like to be a public 'Internet radio station').
Btw, I notice the same 'delay' before sound issueth forth on the receiving end with Expressions as I did with Winamp.