My first reaction, of course, was 'Who?!' This may bode well though, because I had no clue who David Tennant was either when he was cast as Ten. I'm rather pleased that they picked a relative unknown for the role.
And I just noticed that Matt's drama 'Party Animals' is screening on the ABC this week, so I must tune in now and see what he's like!
Aaaaaand I just went to check doctorwho and the comm has turned into a major wankfest as expected. *sigh* Fandom, you may be bitching now but I'll bet anything that all these fangirls will fall in love with Eleven the moment he makes his first appearance in costume.