Mogrith posted this in another thread, and it worked for me.
There is a weird bug in the market app. You need to clear the data in goggle apps before a new d/l will work.Try this:Best way I've found to D/L apps in market.Go into Market find and start D/l of app you want, it will just sit there at starting d/l. That's ok for now just find the next app you want and start a d/l on it. Repeat until you have all the apps you want.Now cancel all the D/l you started.Exit the market.Go into setttings, manage applications and clear data in Goggle apps.Exit settingsGo back into market Login again and into D/L tabFind the largest app and start the d/l. It should start.While the d/l is still going on start the rest of the apps D/l.You can start another d/l as long as another app is still d/l. It's like once the Market thinks it's done with d/l's it's screwed up and won't start another. But as long as one app is is in d/l you can start another.Good luck