Here are a selection of recommended links

Information and communities

Urban Modellers' SIG

Cool technology

The Flea II is an amazing micro-engineered turnout switch with embedded DCC decoder. I wonder about how one replaces a dud though.

Useful hubs/portals/directories

(unsolicited unpaid) links to suppliers

I'm sure there are other good suppliers but I get all my DCC gear from Tony's

A top source of toys for a tool-junkie is MicroMark