I am working with a coach on form but I believe what he says is similar to chi running. It's the foot flat stride with significant weight shift from one side to the other, higher knees and heels than I'm used to and LOTS of upper body, arm driven rotation.
It made a huge difference on how my legs felt running off the bike. It gets me using my glutes more and hams less.
To answer some of your other questions, my long runs were paced at 11 to 13 mm. But closer to racing I started to do longer runs at race tempo, working up to a 1 mile warm-up, 13 miles at just sub lactate threshold and 1 mile cool down. That was my hardest run.
I'm also going to try crossfit.com this year. I'll let you know more when I know more. Just found out abut it last night.
Living life like there's no tomorrow.
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2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS