All iTunes songs sold now are DRM free (no copy protection), so they can be transferred over to the Droid regardless of whether they are AAC or MP3 files. You can copy those songs ether by hand or by using one of the sync programs discussed above. If you have older copy protected tunes, you can't listen to them on the Droid (but you should be able to upgrade those files to DRM free songs on iTunes, for a price).
On the other hand, apps from the iTune store can only run on an iPhone or an iPod Touch, they are coded for use on Apple's OS, not the Android OS. So you are out of luck there.
On the other hand, apps from the iTune store can only run on an iPhone or an iPod Touch, they are coded for use on Apple's OS, not the Android OS. So you are out of luck there.