You can only visit on a Monday apparently, so plan that in if you want to have a look around the place.
I can't tell if they actually produce dampfbier, they talk about cooling it to 8c for fermentation and then lagering for a month at 1c, so it's not a dampfbier fermented at high temps then.
They attach a sign as well that has a notice from earlier times:
[img:1yvh8duk]http://www.dampfbierbrauerei.de/img/bier/dampfbier_bier_01.jpg[/img:1yvh8duk]
This translates to:
The mayor would like to inform you that fresh beer is brewed on Tuesday, so he would ask that you don't shit in the river from Sunday onwards <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt="

" title="Smile" /><!-- s:) -->

.