Thanks for your post. We are very pleased to have all of you on board with us in collaboration to make HPC better.
Using the AGP bus as an interconnect is an interesting idea. Unfortunately, it would ideally only allow one or maybe two links to other machines, and it would take much time to bring to fruition--butmaybe a great topic for future research, and maybe even a few PhD's. ;)
However, I am not sure that I would go about this, since it would merely be an excersise in academics. With the advent of PCI-Express* and the bandwidth's and latencies associated with it, this technology brings a whole new scalability and performance game to the table--not to mention the aspect of scales of economy due to future commoditization of it and the host channel adapters that will populate the slots and allow high speed, high bandwidths, and extremely low latencies to connect other nodes to the 'network'.
Thanks again for your post.