Might have to wait for the next update, or use this as an excuse to upgrade the from the current 2.16 Core 2 Duo with 2GB RAM machine, to a newer spec Mac with more RAM. Those 27" iMacs do look nice ...
Good luck with solving your problem, Bill. You certainly need more RAM: 2Gb really isn't enough and I strongly suspect you will notice a very significant increase in speed and responsiveness if you add some. It's likely to be a lot cheaper than a new iMac, as well.
Jeremy