4/180: I have no idea what to make of this preflop action

[SuperUberBob]

First hand at the table. I've been card dead since the start of the tournament. That is all.

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button (t710)
Hero (t2000)
BB (t330)
UTG (t2585)
UTG+1 (t1665)
MP1 (t1955)
MP2 (t1560)
MP3 (t2705)
CO (t1415)

Preflop: Hero is SB with T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, CO calls t50, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t200</font>, <font color="#CC3333">BB raises to t330</font>, <font color="#CC3333">CO raises to t1415</font>, Hero...?

I probably should have raised a bit more preflop, but in the end it really didn't make that much of a difference.

I expected BB to shove, but the overshove by the limper kind of confused me.

Any ideas on this one?