nope check out https://bitcointalksearch.org/topic/m.5491441
I also just got a picture of 20 gridseeds running in a 2U case with no fans! (on the gridseeds) the standard chassis fans did all the work.
Waiting on permission and I'll repost.
Yeah, I was thinking about that. If you would put them on their side, so the airflow can get through the fins easily, you could probably put 4 rows of 15 miners each or so in a 2U case with some high speed fans
No need to put them on their side if you run in scrypt mode:
2U rackmount chassis on sale at newegg: http://www.newegg.com/Product/Product.aspx?Item=N82E16811219022
High Def Photo: http://i.imgur.com/ShUX1sD.jpg
bobby35ny is running 10 gridseeds with the fans removed in these cases as pictured. *this case won't fit a standard atx PSU.
I run my 10 in a rosewill 4U.