Mud-Club Photo Galleries 
They are free and not plastered with adverts!
That's fine if it's for photos that are intended for Mud Club, but as we are given all of this out of the kindness of the site owners, it wouldn't be fair to use the bandwidth for outside interests.
There are lots of free photo hosts, eg
http://www.webshots.com/ which I have used for years and seems fine. Ok you have to put up with ads, but everything has a cost somewhere which needs to be covered.
Regards
Wolfie