Sorry to hear about that, Graham. I looked at your site, that's a lot of good work, a tremendous amount of effort.
I'm with Alan, I don't trust any of the photo-hosting sites. I come from the music business and feel the same way regarding sites that host mp3s. I don't want anyone messing with my content.
I think it may be worth the effort to build out your own website. I use some free software called Gallery:
http://gallery.menalto.com/I'm still on version two, they revved up to v3 some time ago. From what I gather, their engine was (maybe still is) used to drive the MyPhotoAlbum.com website.
I use one of the web hosts on this list:
http://webhostinggeeks.com/Most of those listed are probably fairly reliable and should have installers for Gallery (and similar software) available from their control panels. If you have problems with one host, you can copy your files, export your database and transfer everything to another host. All of the URLs to individual shots will remain intact.
I hope this may be of some help.