For those who haven't visited the site in the last few days:
Flickr free accounts are going to be limited to 1000 images from January 8th. If you have more than 1000 you won't be able to add more. Then on February 5th they delete your oldest pictures until there are 1000 left. The alternative is to switch to the pro version, at $49.99 a year (30% off if you switch this month), which leaves you with unlimited storage. And I suspect that the price won't hold for more than a year or two. Their claim is that most people with free accounts have less than 1000 pictures, which I suspect means that there are a lot of people with very small numbers who signed up then never really did much, then a smaller number of enthusiasts who have lots. E.g. I have over 2000 and would not describe myself as an incredibly active photographer.
It's not quite as bad as Photobucket, but the speed of the change is really annoying.
Not quite decided what to do next - my inclination is to go pro for a year while exploring other options, but it seems likely that the end of free photo hosting is nigh.