Guild of Machine Knitters (UK)
Knitting and Crochet Guild (UK)
Historic Knit - Joyce Meader's website for historic and military knitting
Ravelry - online community of knitters and crocheters, with forums, pattern searching, and project sharing
London Hackspace (UK) - They have a Brother 950i that is up and running with the python scripts to load patterns in. You to can have a go.
Github for the Brother 950i python scripts
K2G2 wiki - Collection of information about electronic knitting machines and lists some of the software and hardware projects.
Adafruit Electro-knit - Becky Stern's introduction to using python scripts with a Brother KH-930e.
Fabienne's blog - Mixing knitting, textile art and hacking.
Andrew Salomone - Knitting art, especially faces on scarves.
Knitic - Art project involving a project to develop an Arduino replacement for the electronics in a Brother knitting machine
img2track - Alternative software to load patterns into a Brother knitting machine
knittington - Alternative software to load patterns into a Brother knitting machine