PDN reported [here] last Thursday that JupiterImages has been acquired by Getty.
Today it's being reported [here]that Corbis is taking a hit with the economy and therefore are cutting the royalty rates it offers to their contributors (at least for rights managed).
With PhotoShelter having closed their stock house doors, Corbis cutting back, and Getty owning almost everything where does that leave the contributors who want other options. The microstock market offers images for a dollar - what royalty can they offer?
If stock imagery is still being purchased, which it is, and agencies want good images where do they head?
I still think individual photographers should offer stock imagery in addition to being commissioned for shoots. If the opportunity is there I say take it, especially since you get all the royalties and there isn't commission being paid to anyone but yourself (and you rep if you have one).