old links:
panorama reference (1)
http://www.cgvs.com/forum/viewtopic.php?t=4388
Stitched Photos [by Andrew Lee]
http://www.cgvs.com/forum/viewtopic.php?t=5133
good Freeware:
[autostitch]
http://www.cs.ubc.ca/~mbrown/autostitch/autostitch.html
[HDRShop]
http://www.hdrshop.com/