The Dutch PHP Usergroup (phpGG) is having a special event at the end of January (on the 24th) - something they're calling the "phpGG Frontend Special".
Here's more from Stefan Koopmanschap's blog entry on the event:
The event is free for active/paying phpGG members and will be 15 Euro for everyone else (for a pre-sale price, after that it's bumped up to 25 Euro). Along with the admission, this also gives you a one year membership in the phpGG.
More information on the event can be found on the phpGG group's website.