The magazine homepage
http://www.kadokawa.co.jp/ya/ was updated with a full lineup and a third preview with a new strip of "The disappearance of Nagato Yuki-chan":
http://www.kadokawa.co.jp/ya/image/ya03.pdf
ETA: On June 26, a fourth preview with a fourth strip was added:
http://www.kadokawa.co.jp/ya/image/ya04.pdf
Posted also in the manga thread:
The third volume of "The Melancholy of Suzumiya Haruhi-chan" will be released next month in two versions:
A limited edition with a Yuki nendroid figurine (announced a long time ago, release date July 10) and the regular edition (July 25).
http://www.kadokawa.co.jp/game/bk_de...d=200811000456
http://www.kadokawa.co.jp/comic/bk_d...d=200811000480
