Just found this post on UKAI and thought it was interesting.
QuoteUnlimited uploads, unlimited size, for free
Astrophotography images have scientific value that shouldn't be lost in file compression. On AstroBin you can (and should!) upload full size images. And you have unlimited space for free.
http://ukastroimaging.co.uk/forums/index.php?topic=54381.0;topicseen
Carole
Just tried it, it won't take Tiffs but will take, Jpeg, PNG and Gif
Carole
Just in case you've not looked at it lately. File sizes are unlimited and you can also store raw files.
http://www.astrobin.com/