Because yooouuu asked for it! (Right?)
A compilation of 4-koma for MH came out from Enterbrain back on September 24th. I've attached a cover image and some samples.
http://www.enterbrain.co.jp/magical-...nyu/index.html
http://www.amazon.co.jp/dp/4047276006
No word on Volume 7 of the manga compilation, but apparently the series is still going...