Soooo, my official SOE e-mail says: I wanna see what we get! Anyone found out yet? I'm expecting it'll just be a title or some such, but I'm excited anyhow. Following the link in the e-mail just takes me to the PS2 homepage. :/
Word on the PS2 forums (eventually) came back that there are rewards for Beta, for being a Vet, and for alpha squad. From what I hear, Veteran gets you a "veteran" title - and quite possible a Planetside (1?) logo for your vehicle.