Comment 21 for bug 296020

Mesa is a source package which provides the source for many binary packages, including the two you mentioned. http://packages.ubuntu.com/source/intrepid/mesa
Mesa 7.2 (or rather a RC IIRC) has been in Intrepid all along, but "the new GEM stuff" hasn't.

Which PPA have you updated to? I assume it's one of these two:
https://launchpad.net/~xorg-edgers/+archive/ppa
https://edge.launchpad.net/~intel-gfx-testing/+archive/ppa

At least the last of these two don't have the newest drivers that are currently in Jaunty. The easiest way to test is probably to download the alpha-4 Jaunty LiveCD from http://cdimage.ubuntu.com/releases/jaunty/