CLAMP-NET's mid-May update: no new scheduling breaks, but not much else to add...
GATE 7 ~ [JUMP SQ. - monthly chapters]
~no new scheduling breaks through July 4th~
June 3: Volume 1 (to celebrate Volume 1's release, @Mobile members will be able to download new blog addins..chibiyuuto has shared the blog part illustration and script here)
Kobato. ~ [Newtype - monthly drops]
~no new scheduling breaks through July 10th~
July 25: Volume 6
Summer: xxxHolic Artbook
June 1-15: Blythe Charity auction at Crownjewel.co.jp.
July 7: BLOOD-C anime airs
August 26: Both Cardcaptor Sakura movies released on Blu-ray in Japan [Bandai]
Date unknown: CLAMP in America
Date unknown: Code Geass GAIDEN: Boukoku no Akito