I, Digigami of Bitcointalk certify that I control this BTC address which is also currently credited with 152 ASICMINER shares.
Just a small note: Always add the current date in the message.
Or use Inputs.io's message signing which does it for you already, and wraps it up in a nice format.
-----BEGIN BITCOIN SIGNED MESSAGE-----
Signed by Inputs.io on 07/07/13 02:36:12
Example message
-----BEGIN SIGNATURE-----
13LUGyXdAenEEMzKKP1Tr2a1ASSyKW9ixR
IHiNaYhROVMX3L3SC12c3V9RxE5zNgbe+QBpHTHnPnts6xSPKvZ3lv5aqeznbUpnQ3fDdKAXu6fZfoXa5NqWwkk=
-----END BITCOIN SIGNED MESSAGE-----