The 12"
Shiva-X and 15"
Tempest-X are now on the DIY Cable website. Both drivers have a one way Xmax of 27mm and a Qts of 0.42. The Shiva-X has a Fs of 20.4 Hz and costs $165. The Tempest-X an Fs of 18.5 Hz and costs $175. Kevin's forum at Audio Circle says the Shiva will be ready to ship next week. I assume the same is true for the Tempest-X as he said the shipment with both subwoofers is in customs right now.
Both drivers look like a solid deal.