Thanks - like others, I have no objection in principle to paying for this, I know how much web space costs from my own site, and running something like Flickr can't be cheap. My problem is mainly the speed of the change, it feels like they're trying to rush people into it without giving them a lot of time to explore other options. What I really want to avoid is a situation where they get people locked in then start ramping up the price dramatically.
Incidentally, if you can find any way of justifying your picture as being of scientific or academic interest etc. it's very easy to upload images to Wikimedia Commons and link to them - for example, I have a lot of pictures of railway construction and of an industrial archaeological excavation there, and have used them in several blog entries etc. The down side is that you have to use copyright terms that let anyone use the images in Wikipedia and elsewhere, not a problem for me but some might find it restrictive. For example, this picture of a coot shows its feet unusually clearly:
This isn't actually used in Wikipedia at all, but it could be if they wanted to.