I ran across someone talking about 'the Brenizer method' (stitching together many short telephoto shots to make a composite with the FOV of a wide-angle but no distortion and the DOF of a telephoto - or, as some people have said, a Large Format look).
One link:
http://blog.buiphotography.com/2009/07/the-brenizer-method-explained-with-directions/
I'd also read landscape people talk about stitching panoramas but never paid much attention because I don't do much landscape.
Tried a quickie 'Brenizer' with a borrowed 60D (I have no digital camera at all until tomorrow or Thursday). 5 columns of 6 rows give or take - the final image was 192.5 megapixels, native print size @ 360DPI is 30x45 inches. Super easy to do on the trial version of CS5 I downloaded (which has Photomerge built in).
I dunno about the Brenizer thing, but stitching is definitely interesting for some of the architectural documentation I do at work. Files are ungodly large, but I could resize in PS/LR before really working on them.
Full-size JPG of this is 138GB, Flickr's limit is 20GB so I had to make it smaller.