There's a big heap of possibilities to store your art online.
You can join art-boards like:
http://www.deviantart.com/
http://www.furaffinity.net/
You can use your own Site
You can create a Photobucket account:
http://photobucket.com/
You can use other services to upload it:
http://tinypic.com/
http://imageshack.us/
http://www.turboimagehost.com/
Got any other addresses?
Feel free to add them here.
useful other links include URL shortening services:
http://tinyurl.com/
http://snipurl.com/
Less useful is:
http://www.kirun.co.uk/web/makealongerlink/
... although somewhat amusing :-)