Computerworld has a list (that they are continuing to update) of which devices are getting Google Android 4 (Ice cream sandwich).
Alas, there’s no news of some phones, including my HTC Desire S. (The Desire non-S is looking very iffy, apparently.) There is a hacky way of getting it onto a Desire S… if you’re willing to forego being able to use the camera. No thanks. No doubt some other devices have this option available too, for the hardcore.
The bigger picture on this is that with a myriad of phone manufacturers, Android updates are a lot more hit and miss than Apple’s, where Apple’s absolute control clearly benefits customers by making operating system updates available quickly on all recent models of phone.