Gerakan Bawah Tanah - Mr. GBT

I am starting to use Shelfari dan Goodreads to store my book collection. It's not up to date yet, but now I can put my books there. I used to put my collection in a local internet database (koleksi.mania.or.id), but it's gone now. Now, is there a similar social network site that I can use to store collection of my audio CDs , cassettes, and MP3 collections? Now, I am not thinking about uploading the content (like MP3), but just entering the list. I would then could see collections of other users, just like in a regular social network site. Just maybe last.fm would hear this? Any recommendation? On a similar situation ... I write a lot of articles and give a lot of presentations. (And I mean a lot.) Now, I would like to record the title of my presentations (articles) and even give the presentations (articles) away. Right now I edit the list manually. You can see it in my web site ( budi.insan.co.id ), in the articles and presentations section. It's a pain to do it manuall...