GreaseMonkey is my newest play thing

I have just been installing greasemonkey and I think I like it. The full screen editor option for Blogger.com is great, just what I always wanted. But still I would like a few more tweeks to it, like full screen editing when I got to edit a post. I'm wonder how hard a learning curve it is to program my own scripts or edit existing ones.

I would like to make some for trademe, like eBay Hacks - Show only negative feedback
and eBay Item Reloader that auto relists finished auctions.