So I heard it's Andrew's birthday.
This thing works like those huge cards that you buy and then have however-many people sign it and present it to them with everyone's signatures inside.
It's 800x800, so keep the size of what you dump on it reasonable; it's white-backgrounded so that those of you using MS Paint aren't totally left out of the loop; put your signature (or drawing or whatever) in a reasonably little space on the picture (I'd recommend just the signature and not going above 100x100) and then post it back here. mK just reminded me, make sure you use .png to save so we don't get image artifacts.
I'll stop talking now and just put up the first iteration.
P.S. spoilers are nice for those people using smaller resolutions. 'k?