AOL has given us some figures on Key Usage for the submissions that have come in thus far. These figures are unofficial and subject to change....

IM Loud.............. 53251
infomess............. 1215
IM Whiteboard........ 55920
Retyper.............. 34373
IM Remote............ 38030
QuizBot3000.......... 72
FeedReader........... 2808
MathBot3500.......... 162
TriviaFrenzy......... 254
Insta-Sketch......... 1506
MathSolverBot........ 18
LinkPreview.......... 16419
eDatingBot........... 60
AIMSpellCheckBot..... 50
TypingTutorPlus...... 203
PopsChat............. 511
TheAnswersBot........ 31
CodeRemote........... 107
ASCIICheckers........ 111
Font Corrector....... 5563
PublishBot........... 16
AIMySQL.............. 212
NoaLIZA.............. 25
Share-a-Map.......... 3763
A2ZTradersSearch..... 129
Flaim................ 502
MYFriendsOnAIM....... 67
Buddy Personality.... 158
MrEnglishBot......... 49
FriendFeed........... 24710
TalkAbout............ 991

Remember, API Key usage is just 20% of the score for your app, so it's not the only factor and there's still time submit and have a chance at a cash prize.

• Usage (20%): Usage will be determined based on usage statistics. It is strictly prohibited to manufacture or attempt to manufacture usage in any way. Usage and activity shall be subject to audit by TopCoder and/or AOL.
• Innovation (20%): Determined by the Competition judges
• Best Use of APIs (20%): Best use of the functionality provided by the Specified Technology
• AOL favorite (20%): Popularity among AOL staff
• TopCoder Community Favorite (20%): Popularity among the TopCoder Community

If you have questions... post them in the forums.