Thanks for the kind comments!
Titus - I'm running Linux at home and work, so really the only choice is to use freeware. The GIMP is an excellent program, and has many of the features of PS, but I do find it lacking in a few areas. It keeps getting better and better, though! Hugin is really just a GUI frontend for the panorama tools library, which appears to be used by quite a few programs.
belmondo - It's a great park... I just moved here from the midwest a couple months ago, and even though I live and work just a mile or two from it, seems not many people know of it. I found it when I was browsing a map, and figured it could make for a good hike. Saw some nice wildlife (a couple deer, and a few of nature's roto-tiller, the wild pig), which really surprised me given its proximity to suburbia. I'll definitely be heading there again.
I got the print back, and it looks GREAT! The noise is visible, but you have to look pretty darn close. The price was really good... $30 for a 48"x14.4" print at Kinko's. Now I just need to figure out how to frame it...