Thanks for the info! I will check into the column thing. Thus far, I've been keeping track of purchases in Microsoft Access for the smaller ebook stores like Fictionwise and DANL. I haven't done my Amazon and B&N purchases because there isn't an easy way to import them. This is all because I really get a kick out of looking at the list price and seeing how much LESS my purchase price was.
Now to figure out my library structure. Think I'm going to play around with it on paper before I do anything in Calibre! I have a fairly good shelf/category system going on my devices, so that should help immensely.
I'm such a dork, I love organizing!