I just thought i would throw this out there - I aint having problem one!!!
Started on SC 2.9 something, not sure which one. Had the eco1 modem.
I took the plunge and wiped my phone completely. Downgraded to stock. Updated twice through verizon. Odin cwr3.0. wiped, cleaned wiped cleaned etc. Installed without hitch. Used paid version of titanium to restore all my apps and data, and everything seems to be flying smoothly. Battery probably seems better, but it was slow at work and I was playing Plants vs Zombies all day, got home and was at around 40%. No force closes, no hang ups. Flashed the 2.0 with pbj-50 (the updated one). No 3g signal issues, if anything running better. Seems faster. So for me, it worked great, in case anyone was wondering otherwise. Weatherbug works fine. In my house, no matter what phone on what service, reception sucks, but gps locked in great. I am guessing there are more people having no problems that just aren't saying anything, then there are people with problems. Not too many people say that everything is fine, and i think thats what may shy some of us away from doing this. Was for me at first. But backup backup backup is the key and if it dont work, back it up to what did.
That's my two cents and thanks to everyone here, mods and members for so much help and info. Love this phone, and can't say nothing but good things about it and this site triples how awesome it is.