no, because
A) i react to seeing my own blood by passing out. its not even needles, i can handle being pricked and whatnot, so long as they have the numbing crap, but if i so much as catch a glance of my own blood in any large quantity, its lights out.
B) i forget what blood group i am, but its the one that can only be donated to the same blood group, so my blood is damn near useless.
if i didn't have an negative involuntary reaction, and a decent blood group, i would in a heartbeat, but as it stands, it seems pointless.