i use
http://www.imageshack.us , don't know if you will like it. I've used it for some really big pics in the past and they don't seem to block the pic if you decide use a direct link. One guy i know actually used their storage to store his entire website pics. And it supports .ZIPped pics upload. (standard compression, winzip 7zip winrar .zip extensions) but i don't think it has a drag and drop feature. Account is helpful but not necessary. no limit to the amount of views a pic can get. Also they don't seem to be very Dial-Up friendly.