Another for you to look at:
http://www.konaworld.com/bike.cfm?content=worldbike

I'd suggest considering the Dr. Fine as well, except that they're already sold out basically everywhere. (I tried to get one and couldn't.)

The question of IGH vs. derailleur systems isn't simple. IGH systems will generally have lower day-to-day and week-to-week maintenance. Lube the chain once in a while and you're pretty much good to go. Not even that if you're using a belt drive system.

They're slightly less efficient in ideal conditions than derailleur systems, but keep their efficiency in bad conditions and when neglected better than a derailleur, due to fewer exposed moving parts. They can also shift when stopped, which is sometimes useful.

The down side is the longer-term maintenance on IGH systems is a pain, particularly if you've been riding a lot in really bad weather (snow/ice/salt). You're talking getting your LBS to tear down the hub, re-lube it, replace worn parts (which may be hard to acquire), etc. I've heard once a year or so is a good frequency.