guys here is thing...i may not have this right but pretty sure...
this website runs on a server which is hosted in basically a hard drive on a computer...I believe Jeff stills hosts the website...so every bit of data such as the formating, words, pictures, etc takes up space on the hard drive. The more data that is stored the slower the website will be. that is a reason there is a limit on picture sizes you can upload....
when you link a picture it actually pulls the image off another website so in turn you don't use up hard drive space.
you can upload pictures in photobucket.com (free account) then copy the url address ( easy to do its below the pictures in your albums) and press the button above and copy the link in the space provided and submit. viola!
This is a way I usually post pics of mine plus I have them in photobucket and can access them from any computer!
The less hard drive space per say that is taken up the faster the website will run...