Chris and I are currently looking at options. Proboards only offer limited free space for embedding files so not a solution at this time. Flickr currently offers the same free facility that Photobucket did - see Chris' post explaining how - it's a bit more cumbersome. You can still download your pics from Photobucket.
We just hope Flickr don't follow Photobucket. Chris has some 3,500 posts to work through to recreate his interesting links so not an exercise to be undertaken more than once! This is a real pain and has destroyed many forums, there was no warning that I am aware of and the fees Photobucket are charging are crazy.