I use text files for this kind of thing. If there's a reason you need a specialized app for this, it's not obvious to me.
I am a sucker for visual displays of media; being able to see the boxart makes my inner magpie happier. However, I'll probably fall back to text files if I can't find an app that's at least as convenient.
I have a problem with developing attachments to the books, movies, games, and other media that I enjoy. For example, after I finished playing the new Prince of Persia title via rental, I enjoyed it so much that I went out and bought my own copy, even though I knew I would be unlikely to play the game again for at least a year.
This is wasteful in a lot of ways. The media takes up unnecessary space, and makes moving from one place to another more difficult; the last time I moved, easily 3/4 the boxes contained media, primarily books which have especially low information-to-weight and information-to-volume ratios.
More importantly, my magpie habit uses up money, even though there are numerous free or inexpensive long-term rental services like NetFlix, GameFly, and my old favorite the US public library system.
I've decided to get around this by trying to transfer my sense of ownership from the item itself to the memory of the experience of enjoying it. So, I've been writing up reviews of all the games, movies, and books that I own, and also all those that I can remember enjoying in the past even if I don't currently own them. I want this "collection" to feel complete, so that I'm not tempted to go and spend $40 on some old SNES cartridge for the sake of posterity, or to buy any more books that I'm not actually expecting to read often enough or on short notice enough to offset the tiny cost of going down to the library and checking it out when needed.
I've been trying to look around for some computer application or net service that can help me do this, but to my surprise, pickings have been pretty slim! The only one that seems vaguely close is blippr, which exhibits a number of good ideas:
These things are all great, but unfortunately blippr is badly marred by poor responsiveness and a terrible user interface design. It also seems as though development on it has effectively halted for the last year or so, and the source is unfortunately not available for me to contribute improvements myself. I've managed to review a couple hundred items anyways, but it took much longer than it should have, and I'm losing patience with its quirks fairly quickly.
My questions for y'all are: