The folks at X-Philanthropy have organized a couple of weeks of auctions of memorabilia to honor Gillian's and David's B-days!
The first round focuses on Gillian Anderson's items, and proceeds will benefit SAYes through Friends of SAYes Germany, and you can find links appropriate to your country, here:
The first round finishes this weekend but, stay tuned! The following week it's David's turn. Donations will be benefiting Target Zero. Make sure to check out the items, and if you have any questions, you can always hit them up for queries through their Ebay page.