Like last year, the German PostgreSQL User Group will have a Devroom at FroSCon (Sankt Augustin, Germany) this year. There will be talks around PostgreSQL, ASP.NET, the upcoming feature set in 9.0 and a workshop how to setup PostgreSQL 9.0 replication. The talks in detail can be found here (look for room C117).
For people interested in technical discussions or brainstorming, there's a booth at the conference, too, where people can meet PostgreSQL community members to discuss their questions. See you there!