Well I just checked and was able to download for the Mogul
Can't say I'm too impressed yet but there are some neat features.
I went to
http://mobile.yahoo.com/go
Then clicked the Get Yahoo Go Now button.
From there select the Windows Mobile devices link.
Then select the Sprint PPC-6800 (even though it says coming soon on the picture).
After that I had it send me a text message and the download link was finally there. All it ever used to say is "Coming Soon".
Downloaded and installed. I'll have to play with it a little.