I upgraded my Captivate a couple of days after I bought the phone. Everything went as planned and about 15 minutes I was back in business with 2.2 loaded up. I noticed a few more options with the update and everything seems to be working fine. Not sure what to make of the GPS issue. I notice it takes a long time to connect and can drop out randomly. I found a GPS Status app on the Android Market. Maybe that will answer some questions about GPS connectivity.
I also passed the 2.2 update and instructions along to a friend who just bought a Captivate and he had the same straight forward installation I did.

Thanks for all the info.