I also got stuck in a boot loop the first time I installed everything at one. There was a post in the XDA forum for this and it said:
1. Flash ROM, reboot.
2. Flash GAPPS, reboot.
3. Flash themes, reboot.
I did a full wipe (using Calkulin's Format zip package) then flashed the ROM and rebooted. Booted back into recovery, wiped cache and dalvik, then flashed GAPPS and rebooted back into the ROM. I then ran through all the setup stuff im the OS and reinstalled all my apps. I then booted back into recover, wiped cache and dalvik, and flashed the themes, and rebooted. Been running rock solid ever since (yesterday)!
Some prettly cool graphics and screen transitions, but they get annoying after a while. Not sure how much longer I'll run this ROM but it's based off CM7 RC2, so it is very stable. Haven't turned on 4G yet, but I know 4G was working in CM7 RC2, so I have no reason to believe that it won't work.