Hey Guys,
It looks like someone at Sonic Games is watching this thread, as the clue appears to have been updated and now reads:
Find the H2O number and email "the H2O number" to: TheH2Onumber@sonicgames-uk.com to get the 2nd clue emailed to you. (Replace 'TheH2Onumber' with the actual number found to make this a valid email address).
So the $10,000 is still is still up for grabs if you can figure out what 'TheH2Onumber' is, don't know about you, but I don't have a clue!