I use http://www.collectorz.com/ though I have been a little lax of late updating with the new discs. I like it, cheap and useful, aimed at CDs so Hybrid-SACDs scan ok on the PC, but not that good with DVD-A/BD-A as you have to manually enter.
Yeah - lists would be obvious. I'm so organized at work...yet I don't bring the trait home. UGH. Maybe I'll work on that...thanks for the nudge.