The Hahanna is a great riding bike for the $$
The Hahanna is a sweet bike for the price. Since Kona put disc brakes on the Fire Mountain for '05, the Hahanna came to being (as the rim brake version of the bike, basically). Same frame, fork, drivetrain, and contact points as the Fire Mountain -- $100 fewer bucks, and probably a pound less weight in the Hahanna makes it sound like a pretty sweet deal. Plus, that red color is deep and sexy when you see it in person.
As noted above, the frame on the Hahanna is the same alloy frame as Kona uses on the $1000 Caldera, so you have plenty of "growing room" with the Hahanna, to upgrade parts as your desire and abilities grow. The frame is worthy.
Good luck!
MG