I got my Wikimania prize package in the mail the other day.
There were numerous items including a Spam Sentinel t-shirt, some IBM bottle openers, IBM bottle sleeves, and the best part, a copy of the Mastering XPages book.
Gotta love it!
Update: I just got a note from one of the organizers asking if I got the mugs. Yup, I did. Two shiny IBM mugs as well. I'll snag a photo of it all tonight.