There is an exciting development going on to bring about the existence of a high-speed, broadband amateur network. Below in an video introducing the concept and how to get involved.
More information can be found on the Austin group's website:
HSMM-Mesh.org including a link to a
buying guide for WRT54G hardware. Other hardware may be supported, but this is currently the best list.
By registering with the site, you gain access to a few more links to information as well as updates when they happen. Also, check out the
Yahoo Group: DAWG-HSMM which is made up, mostly, of mesh-net hams in the Dallas area.