@chrisperro, iTunes (and Winamp for the PC and, soon, rhythmbox and banshee on Linux) is only used for playback on that computer. Let’s say all of your music is on a media server, you don’t even need a player installed to enjoy from that computer on your iPhone. Just Simplify Media, which must be running.
@agl917, we agree. sort (and jump to a letter) would make All Songs more userful.
@NetMage, thanks!
@Jodie and chrisperro, thank you for helping us find a bug
For the curious, we neglect to trim trailing spaces after your screen name and password if you enter one by accident on the iPhone. When we send the information to our authentication server, the authentication server throws an error because of the space and the connection times out. If your credentials were just wrong, you would be prompted that your login failed, but in this case we don’t do that.
We’ll fix this quickly, but, for now, don’t enter a space after your user name

If you get a can’t connect message over and over again, as Jodie suggests delete this file:
/var/root/Library/Preferences/com.simplifymedia.mobilemanager.plist
I think everyone is up and running now (including meagain). Lgreenberg still has a playlist problem, but it isn’t iPhone-related and hopefully we can track that down soon too. We’ll continue to read MMi, but if you have any trouble drop us an email to make sure we see it. Thanks again!