Steven,
I'm currently looking for a Home Theater / Home Automation front end to call my home. BUT I've ran into a few issues...
1) I currently use Netremote and have invested a ton of time
2) XLobby looks GREAT but still lacks some must-have features to use for my WinCE touchscreen and integration with Homeseer (my home automation server software)
3) Media Portal looks promising too!
I was thinking that it may be a good idea to see if all the dev guru's building these apps wanted to combine efforts and build a seriously kick azz front-end. It seems to me that XLobby would/should be the base for the dev since most of the needed base functionality is already there.
what do you think?