For those performing an update to 2.1 for your Samsung Moment using the base files from SDX, we have found that you will now have to apply the Market app fix to see any apps in the market. This is probably due to the fact that the update is coming soon and they (Google) are deleting access to old builds in the marketplace. If you update from custom roms from the site and the market fix is included please remember to follow the instructions about the time change. Link below
How to access Protected Apps in the Market...
How to access Protected Apps in the Market...