Bazinga. The Qualcomm chip in the T-Mobile Galaxy S II has been overclocked to 1.8GHz, and as far as we know nothing has caught fire and no fuzzy animals have been harmed. The Hercules is the oddball of the Samsung Galaxy S II line, using a different chipset to achieve those rocking 42 M/sec HSPA+ speeds, and many feared there would be little developer interest in the handset. It looks like that's a theory that's been thoroughly squashed, as Romanbb's kernel has been reported to work just fine with most of the custom ROM's floating around out there.
If you have a T-Mo Galaxy S II, and aren't put off by the risk of the pretty blue smoke, hit the source link and give it a look. Be sure to shout out in the forums about how it went, we all love a
guinea pig tester.
Source: XDA Developers. Thanks, Mario!