We don't have a thread for this yet. It would be nice to gather a list of Metamorph themes our peeps use. As people update with their favorites, I'll update this list so we can have a comprehensive list of the best themes.
Smoked Glass Theme - Adamz' theme that is part of his ROMs.
Droidinator - Red/Industrial theme.
Ice - Light/bright ice-blue theme with font.
High Res Blue - Glassy theme that advertises high resolution icons.
NOTE: To install these themes you need a Rooted Phone and the
Metamorph application from the marketplace.