You want to take your pictures at the lowest resolution your camera will allow for a nice small file size...the finer the resolution the larger the file size and most of the time it does not show better quality online. (1024 X 768 is quite a bit larger than 640 X 480) most cameras go much lower than 640 X 480.
BTW I took the plunge and bought a grube skyhawk 66 from kingsmotorbike...will keep yal updated on my progress. It was $180 shipped to Dallas burb. I decided to go with them due to the #41 chain. I'm mounting it on a mountain bike I got for $40 at a pawn shop a month ago.