Buying itunes gift card for friend in NL

Two possible answers...

Assuming you've not actively deleted them from iTunes as well as from your iPhone...

1. Upgrade to iTunes 10.x if you haven't already
2. Plug your iPhone into your Mac, open iTunes, sync it.
3. Click on the iPhone in the side bar and go to the Apps tab

You'll see that some apps are checked and others are not. This is an indicator of whether or not they're installed on the device.

Pretty sure this got introduced in iTunes 10.x (hence the first step)

Assuming you don't delete your old emails... (e.g. Archive in GMail)

The iTunes store should have emailed you summaries of the apps you've purchased (even the free ones) shortly after their 'purchase', so, if you have an email account where you've kept those emails, you could search through them to get a list of each app you've purchased from the iTunes store.

No, iTunes and related apps use the artwork from the initial track of each album. Yes, it is frustrating. And no, it is not worth retagging your songs to pretend each of the tracks is its own album.

I asked what is essentially the same question over here:

https://superuser.com/questions/11081/how-can-i-force-front-row-to-show-me-single-artwork-instead-of-album-artwork

In case you want to ask Apple to add this feature, here is the feedback page for iTunes: http://www.apple.com/feedback/itunesapp.html