If you were part of the OpenStack keysigning party from the summit, you are currently probably getting a bunch of emails sent by caff. This is an easy way to let a key signer send you your signed key.
These are really easy to process if you are using Thunderbird + Enigmail as your signed/encrypted mail platform. Just open up the mail attachments, right click, and import key:
Once you’ve done this you’ll have included the signature in your local database. Then from the command line you can:
gpg --send-key YOURKEYID
And then you are done.