When you get CM7 back on it, don't restore your apps through Titanium Backup. This seems to be causing issues with everyone.
Also, look through your app list and make sure they are all verified working with GB. It sounds like it started after restoring your apps, which makes me think an app is the root cause. If there is anything that is known to have issues with GB, uninstall it after the sbf so they don't restore when you install CM7.
Oh crap I did! Shoot.. no problems but I did one at a time and no system apps...
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It shouldn't be too big of a deal. most of the issues come when you restore the data. I restored my apps and data, but I ONLY restored data for the apps I really needed the data back for (my alarm app, notes app, things like that)
I did run into a few problems after restoring that data, but then I went back into recovery, cleared cache and dalvik cache, and all was good again.