My company finally got GOOD so we could get corporate email. I was rooted (z4) running 2.2 and OCLF lag fix. The GOOD servers wouldn't allow initially because it detected the root. Even after unroot it still detected... after trial and error many times I realized Z4 makes superuser a system app so you can't delete it (the normal way) and the GOOD servers recognized it and wouldn't allow connection. I had to download an app that lets you delete system apps (superuser didn't show up in Titanium either). Once deleted GOOD installed. Was a problem for me so I figured I'd put it out there incase anyone else rooted with Z4 and wants Enterprise email access.