[barflyrex]

If you want to leave from BKK city you can get the skytrain to ekamai station, thats were the eastern bus station is, once there, buses go to pattaya every half hour for 100 baht.
Or you can ger a taxi to pattaya for around 1400 baht.

If you want to get there from BKK airport you can get a taxi for, again 1400 baht, or get a taxi to Mo Chit, theres a bus station there and its 100 baht to pattaya with buses every half hour or so (thai time)

Thai airways has mini buses from the airport, but Ive herd its a balls up, and the buses are those little van types were you need to be a sardine to feel comfortable.

Rexy