joining mpg's to one giant flv using ffmpeg

I have a bunch of mpg's (extention avi) from my cannon digital elph which I would like to combine to make one giant flv suitable for web viewing.

This was a good start: http://ffmpeg.mplayerhq.hu/faq.html#TOC29

but in the end, it became as simple as doing the following

cat *.AVI > bigcahuna.mpg
ffmpeg -i bigcahuna.mpg -f flv -s 640x480 priderock.flv

That's it!

for more possibly relevant material, see: http://del.icio.us/gdw/flv