I know that there are many trading card bloggers out there that are also comic book collectors. Myself included. As a matter of fact I have a very large collection. Too big. Keeping track of you comics and what you have can be a pain and keeping track of the value of your collection even more so. I found this site Comic Book Realm a while back when it was called My Comic Pile. It's an awesome resource that's free and lets you input your collection.Tthey show you how many comics you have, the value, and track your collection over time.
I use to keep track of my comics in index cards, with each card as a title and then writing the issues I had on that card, updating it every time I got new comics. I still do just as a back up. CBR is probably the best comic book organizational software that I've found. Plus you can help the cause by uploading covers that aren't in the database and employing your general knowledge.
The site also has links to blogs, chat, forums, new releases, and other stuff. I highly recommend it.