I’m a little late to the game, but Microsoft released a stitching tool called Image Composite Editor (ICE, and please note my restraint in not naming this blog post ‘ICE ICE Baby’), this is also available in Live Photo Gallery apparently (don’t use it myself).  I’ve always used the tool that came with my Canon software because it was easy, but after taking a couple panorama shots in Death Valley while I was at Mix09, I became very disappointed.

You can see above the very obvious seems, and that is after I touched it up a little bit.  Destiny provided me link to ICE right after this failed experiment with the Canon tools and I tried it and was blown away.  It can do a lot of very cool things, and most importantly it merged my images without the slightest indication of a seem.