I've noticed that my app's icon displays fine everywhere except in iTunes under Applications. In Titanium I have it 'packaging' to iTunes.
Is this something that will be fixed once I submit to App Store?
This is normal during development. Your icon will appear when you package for distribution.
If you are determined to see your icon in iTunes (during development), copy your app icon and rename it
iTunesArtwork. Put this new file in your
resources/iphonedirectory, then rebuild.