Why won't the apps I installed on my droid open?
Most developers who make high demand apps (angry birds, twitter, ect.) will release apps for both the platforms
Can you Buy Apps from a prepaid plan HTC droid?
I do believe you have to have a debit/credit card on file seeing how they cant bill you and when i had a droid and bought apps they took the money from my debit card. (source: Droid owner)
Are there any ESPN fantasy apps on the droid?
There should be one next week: http://www.droid-life.com/2010/09/01/huddlehub-to-offer-espn-fantasy-football-action-for-android/
How do you view downloaded apps from the android market on the droid incredible?
Can Android apps be installed on HTC phones?
yes that can dude