Ouch. Glad you got it working. I don't know whether you saw this thread: http://www.ubercart.org/forum/support/213/moving_e_commerce_module_uberc... but it sounds like you took similar steps.

Which uc_ table did you have to manually delete? That should be fixed in the code, to save the next person some headaches. Also, did you look at the "variable" table to see if there were any ec_ or uc_ variables left over?