Avatar uploads are limited to 20K, and will automatically be shrunk down to 64x64 by your browser.
That means that if you put up a 500x500 pixel image, the server stores it as 500x500. Users download it
full sized, and then their browser makes it
look smaller.
Out of consideration for those with dial-up, please try to limit the avatar size to as small as possible.
If you use an image from another website and don't upload it, the person viewing the page still has to download the full image. So, for example, if you use a 200K image for your avatar, it could take about 40 seconds to load for someone with a dial-up account. In this case, I'd recommend you just send me an email so I can resize it and send it back. I'm really fast about this... just ask around!
Mike