I know you requested this pic for your avatar... and I'll probably work on it later, but I now have noticed that you made the same pic your siggy... Anyways... it would look good, but as you notice it looks all pixelated dirty. I'm going to go out on a limb here and say it's probably because you tried to resize it and whatever program you used resizes poorly (even photoshop resizes poorly in my experience). It could also be because you saved it as a .jpg which tends to do that. You might try .png or .gif in the future.
Anyways... I decided to go ahead and crop the picture the same as you have it and upload it.
You'll still have to put your name on it, like with your sig already.... but I assume that should be easy enough, and this will look nicer than what you've got now.
Also... I wanna recommend you go out and find irfanview. It's freeware, it's a very small download, a quick file, and it's great for doing simple image manipulation like cropping and resizing. On top of that it supports a whole slew of image types, and you can convert between them very easily. My favorite thing about it is that anything I put into it comes out looking very clean.