My name is Thomas Lörtsch. You can reach me as firstname.lastname@example.org and, very irregularily, as "tl" or "tomlurge" in the #microformats chat.
I did work at "essen & trinken" (rough translation: "eating & drinking"), a fairly popular website  about cooking in german. One of the main features of the site is a collection of about 10.000 recipes, all actually tried, categorized, etc. While searching for a standard ontology we came across the hRecipe proposal, which by and large fitted well with what we had already. I helped moving it forward to the current Draft status and implemented it on essen & trinken with RDFa.
Please note that my former mail adress at guj.de does not work anymore.