Due to some of the Maemo projects getting too busy I've had to back off from Mer so I'm a bit out of the loop. So the short answer is from what I gather, currently not. For the last release of Mer, they were in kind of a holding pattern waiting for Maemo 5 code drops from Nokia. Hopefully it'll be shaping up soon.

The best ways to get an idea of the status include

• Checking the known issues on the Mer download page
• Checking the hardware support page (But sometimes people are slow in updating it)
• Downloading the Virtual Machine image and trying it out.