http://www.youtube.com/watch?v=HsH4y76fqDw Dawn (with a bit of help from Ryan and Drew) has put together this video, aimed at beginner contact jugglers, which discusses the different ball options available for 1 ball contact juggling.
Jea9 balls – 125mm/5″ mister babache Stage ball
Acrylic balls, 75mm, 100mm and 120mm (3″/4″ and 4.75″)
100mm/4″ Hard stage balls
100mm/4″ Stage balls (squidgy)
100mm/4″ Sil-X balls
Fushigi balls (sorry for mentioning the f-word)
Tennis ball and a