It's nearly July. There is yet no information about the fabled Developer Kit, nor is there chipset pricing available for OEM consideration. Lame.
We are also looking for the same thing. It's mid-July now and our Intel sales rep says we have to keep checking later.
Any update on Intel's Developer Kit?
it's almost a year later now and I still don't see and TB SDK around - what's up here Intel?
Check out the Thunderbolt Technology Community at https://thunderbolttechnology.net/. Developers can use the "Contact Us" link.
I hope this helps.