Right now I've got four apps available to me - Vlingo, Shazam, Bubble Bash 2, and DriveSafe.ly. I believe you have to go on App World on your BlackBerry for them to be available. If you open it up then it should say after it loads "A Thank You Gift from BlackBerry" and then you click on that to download them.
If you're still only getting 2 then go back to the main App World screen and press RSTRST while holding down the ALT key (for App World 3.0) or RST while holding down ALT (for App World 2.0). This clears the cache and once you open App World again, It should once again say "A Thank You Gift from BlackBerry". Click on that and all of the available apps should be there.