2D) wins this round!
The last mined block as of this update was 316596. I'll skip the next block, then use 316598 for the
throwing check and 316599 for the
spear check.
Blockchain.info reports that the average time between blocks is 8.37 minutes. So,
throwing success requires a time under 10.37 minutes (+2 minutes for
proficient) and success with the
spear needs a block under 9.37 minutes (+1 minute for
versed).
Update: used slightly later blocks. In future, I'll use precise 24 or 48 (etc.) hour deadlines from the time of announcement.
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Pretty cool so far. I need to get myself some of them Testnet coins as well pretty soon

Thanks, DreadKnight. Testnet coins aren't widely held among those not actively experimenting with Bitcoin. Not to worry, the real game will begin soon.