Slingshot Rad boots
 

http://www.thewakeplace.com/?p=749

a little bit before the half way point, its the best picture ive seen of them so far.

hate to say it, but those are the older slingshot RAD boots that never made it to final production.
they will release a newer boot in august some time. it will be totally different from my understanding. the 4 hole system is no-longer and the boots are baseless similar to ronix. the liners are still removable... and this is about all i can confirm. mostly from the info given in the last alliance mag and from word on the forums