High Power Diode Laser

http://dev.forums.reprap.org/read.php?1,29187

includes 1 watt diode lasers

More

If we can work out the optics, high power diode lasers might be an option. 2W, 808nm, $45:

http://us.ebid.net/perl/auction.cgi?mo=auction&auction=15847337&from=googlebase

It's unfocused, and I'm not sure how we can bring it to a point, but if we can solve that problem we could use the diode bars designed for diode pumped solid state lasers, which go up to at least 80W.

I'm not that interested in pursuing the laser sintering or cutting myself at the moment, but I hope that you find that useful.