OP, more than likely you HAD PREVIOUSLY requested a Beta account. Your PC, as smart as it is most likely REMEMBERED your userid and password.
You just happened to stumble onto the Swype site 2 days after they began issuing new beta testing accounts, and low and behold, BAM your userid was granted access.
Side Note: I like this new Dec version, all except the single letter exception for field inputs like Google search, URL and personal info.
Oops I crapped my pants... Damn Evo