Happy you found it useful. I fixed the issue with the email. All you need is a username now. I'll make it so you can edit your account info and delete your email if you'd like. It's going to be pretty painful to use once the collection gets to a certain size. I want to start work on search soon. You can hit me up at okal at justokal dot com if you have any other suggestions. I'd be glad to hear them.

Have a look at the theassayer link I posted. It appears to fulfill much of your requirements.

Why, thanks! There's a surprisingly complete set of hard science curriculum there, something I'd been wishing for.