zoom-zoom...what perfect timing for you to post this!!! About 3 weeks ago, I started to experience some mysterious creaking noises. Naturally, the first thing that I thought was it had to be my seatpost, because that is where it sounded like it was coming from. The noise would come and go, randomly...no set pattern, but ALWAYS on a pedal stroke, whether in or out of the saddle...but especially OUT of the saddle. Sometimes it would last for hours during a ride, and then suddenly disappear for a while, only to return usually within a few miles from home. This all started after we had ridden 2 consecutive weekends in heavy rain...4 out of 6 of our rides, were either partially or completely in a steady rain. The creaking got so annoying, that I decided to take the bike in to an independent mechanic (not my dealer, cuz they suck and I won't go there anymore...but that's another story). I explained to the mechanic that I was pretty sure it was my seatpost, and he promptly told me that it most likely was NOT my seatpost, but probably my bottom bracket bearings. I too, have an FSA BB30, and he said they are known to have issues with the bearings going prematurely. Got the call that my bike was all fixed, so when I went to pick it up he said the one side was definitely trashed and the other side was on the verge of being trashed...so he replaced both. Rode the bike (85 miles) today for the first time since getting it back, and NO CREAKING. He was right...and I think I've found my new permanent mechanic.
Linda