Make sure your radio Baseband version ends in .12P When I had the no 3G i was on .07P baseband version. I wiped and reflashed and still couldnt get 3g. After I worked around to get it to .12p liberty worked fine. If you have .12p, well....wipe, reflash .zip in CWR.
I've got Baseband version ending in .12p, but I've noticed that 3G seems to hang around 1 or 2 bars all the time. On 2.0.1 I'd get 3-4 in the same places. I haven't really done much in the way of research on it yet, just something I've been seeing.
O, and this ROM is absolutely fantastic. I shall be donating shortly!