(This was previously announced early this year along with an artbook announcement. No word on an artbook date yet, but I'll keep watch.)
Also, the 3rd BLOOD-R webradio show is up. The guest is Kenji Nojima who requested an illustration from CLAMP. (They talk about the illustration about 23 minutes into the radio show.)
And JUMP SQ. LaB will be released tomorrow with several poster giveaways including GATE 7. The website has updated the preview with a new CLAMP illustration for GATE 7. Looks like Date there...
ETA: preview posted by JUMP SQ's twitter account.