I finally settled on a preliminary name for the new "spreadsheet." I'll call it "Phaedra's List" until I come up with a better one. (And, you have to admit, at least it's a more sensical name than "pain.")
The next big decision to make is: Which language do I want to write this in? I figure the end application will be Ajax so JavaScript is going to be a given. On the server interface, though, do I want to use Java servlets, PHP, or Ruby? Ruby is supposed to make building applications with Ajax easy and I have some books in the mail. I figure I'll decide when my big box from Amazon arrives.