To get up running and gunning quickly start with the lightenup and shoot guys. Great informal style, lot's of well thought out and witty videos to show and explain.
Then move up to strobist.com when you're comfortable with the info from Michael and Andy (about a week of experimenting I'd guess). David takes you deeper on your journey with light and introduces you to multiple flash, different modifiers and the whole exciting world of taking control.
Zack Arias is great for getting into the head of an editorial shooter, and has a really good series of posts on shooting white seamless, but his blog isn't so much focussed on teaching lighting as much as DH over at Strobist. The onelight DVD is worth getting a look at, but it isn't cheap, and sprining £9 for the v-book mentioned above will get you started for under a tenner.
After that, there's a whole heap of resources you can dip into, alongside all the other stuff mentioned above take a look at blogs from
Joe McNally
Bert Stephani (Squeeze the Lime)
Drew Gardner (Brit, and damn good at the BIG stuff)
There's also this bloke called Tomas Whitehouse that hangs round here and is getting pretty handy with this off camera light
Guess the lighting's a good one too
http://guessthelighting.com/
But.....
Don't try and run before you can walk, one light at a time and keep it simple, you can shoot some beautiful images with just one flash and a covertible brolly (so much so I'm having a few months of going back to just one light)
