Bidding After a Negative Double

This was a hand I kibitzed from the Reisinger final in Boston:
Both vul:
Kx
KJxx
AT
Txxxx
Partner opens the bidding with 1 Spade and RHO overcalls 2 Clubs. You make a negative double (right?), LHO passes and partner bids 2 Hearts, passed to you. Pretty simple situation--what do you do?

Your Lead

Jason and I defended a hand in Boston that was interesting from the perspective of both defenders. Sadly, it was in one of the regional knockouts and not the Blue Ribbon final. Maybe next year. After polling several people, I decided it is most interesting as a lead problem. Take my cards as West here:
N/S game
KJxxx
xx
Qx
Axxx
South, the dealer, opens 3 Hearts and is raised to 4 by his partner. What is your lead and why?

Hopefully I'll get a few more posts from the tournament up in the coming days and weeks.