you have my sympathies. ds was like this (now 3) and dd is shaping up to be similar (now 6 months). have you read elizabeth pantley's " no-cry sleep solution"? i've just dug it out again because of sore nips due to all night feeding (sorry, tmi!)
anyway, it has some nice ideas. when ds was feeding all through the night this worked:
gradually getting baby used to sleeping without sucking to sleep. as baby starts to drop off, or sucking starts to slow, use your finger to break the seal and remove your nipple. baby will root about. if baby starts to cry, replace nipple and try again after 10 seconds. this can go on for a while so it's a good idea to set aside a few days when you are not going to be too busy during the day/ will have help.
the idea is that eventually baby will get used to falling asleep without feeding to sleep. then you can start to use other methods of getting them back to sleep such as patting, saying "sleepy time", etc. eventually, the theory is that because baby isn't getting fed every time, they decide it's not worth the effort, and just go back to sleep by themselves!
this worked for ds (up to a point - he stopped waking every hour, but he does tend to need a cudde at some point through the night).
hope i've explained this well enough?! it is a good book with lots of other ideas too.