Gimp is great, it's free, and if you're a photoshop user or just don't like Gimps interface, I reccomend using GimpShop, heres the unofficial site https://www.gimpshop.com/opensource/ it's easier to download from here then the official site =P
No it runs fine, not too resource hungry, it could be a real competitor in a couple of versions. I already use it for quick edits, and sometimes I'm just more comfortable with it then Photoshop.
MySpace has become quite crap these days, I've been a member since the network was only in it's thousdands and it was grand then, now it's like, a billion times that? lol