I appear to have created an account using my former employer's Google Apps email; I can no longer access that email account but I can still log in to SO using a linked Yahoo account. I would like to merge that account (and my reputation, etc.) with my personal account, linked to my gmail and facebook accounts.
How can I move/merge two accounts, e.g.
firstname.lastname@example.org (google apps email) email@example.com (via OpenID)
firstname.lastname@example.org (not my real gmail account, via OpenID) tharrison Facebook account