Brion will be speaking at FOSDEM in the "Collaboration" track. This is a VERY good reason to come to Brussels as well and enjoy great beer, great company and great conversations about everything and MediaWiki. I know that Siebrand intends to be there. Several other have expressed their intention to be come. It is likely that we will demonstrate the ExtensionTesting environment...
So check your agenda, and see you in Brussels :)