Thanks very much to everyone who participated, and congrats to the winners! In addition to winning a free Steam copy of the excellent indie game Atom Zombie Smasher, they'll be forever immortalized on the Eden Industries website.
So without further ado, the top 5 finishers and their scores:
1. MrDB - 5,365,8601
2. Ziabster - 4,541,8502
3. Pitatus Roother - 3,878,6103
4. tehTb - 3,851,6904
5. arrowsforu - 3,535,5105
I'll be contacting each of the winners soon with a Steam key for Atom Zombie Smasher. Congrats again, and look for the next Leaderboard Challenge soon!