I think this is a wonderful idea! Ex-smokers have different obstacles to 'ramping up' the running & w.o. training, etc....especially if it was at all long term!
I quit for good Nov '06 ~ after my oral surgeon told me that he would refuse to finish my procedure if I was smoking anything at all!! (@ that time, I was only smoking 2-4/day ultra-lights as I was already working towards quiting - again!!) I got some patches & havent' bought any more. Had to make a focus of staying away from all of my 'triggers' - people, places & things that revolved around smoking....Took a few days even @ that low number. More mental than anything.
I came from a smoking household (upper middle income for all you that buy into the stats propoganda!) & in a generation that basically -(initially) advocated or at least approved of smoking....everything from the media to GNP encouraged/supported smoking (that's changed a little bit, now hasn't it!?!?)....My whole life has been interspersed periods of: smoking regularly - up to a pack a day during times of stress &/or partying; social smoking only - only when drinking -or with other smokers, & 'bumming' smokes from the smokers; quit, am quitting, gearing up to quit, awww screw it! give me the dammed cigarette!!!.......you know! Addiction!! @ the same time, I've always been intermittent active (some of my friends think that I'm pretty intensely active, but I beg to differ!

) Back in the day.....H.S....I was in XC, etc....& as a self-absorbed, know everything teenager, I didn't take it all that seriously...never really worked it, etc. sooo, when in a moment of stupidity, I injured my knees.... (I have absolutely NO scars that are NOT a direct result of my own stupidity!

)... & my PT at the time told me I was "done running." weeelllll, needless to say, it didn't matter that much to me! Then!.......
So.... I quit in Nov. & promptly put on 18lbs through the Holidays......my weight was already up 25lbs before that!! {{{{{{my inner voice}}}}}} PUT THE FORK DOWN!!!
I started counting calories & I took up power walking....relatively speaking..... one day, (about March 07) when I was mad, upset, irritated, etc. I broke into a "shuffle-jog" of sorts (not supposed to be able to do that!) made it about 50 feet before I was completely outta breath!! OMG!!! THIS CANNOT BE!?!? dammed cigarettes!!! ****grumble, grumble, grumble**** (we won't go into the rest of that conversation w/me!) I walked my HR down, & did it again! I continued this sort of 'interval' for a couple of miles!! HMMMM!!! i might can do this...I think I HAVE to do this!!! Went back out the next day with the same intent ~ & again & again ~ building my mileage walk/run interval...... I have no idea when exactly I first ran (very slowly) the first mile all together - but at that time, I thought it was an awfully long ways! lol! yeah, I did the "Rocky Dance" the first time I ran 3.1 w/o walking!!

& 6.2.... THEN I found CR & the C25K program!

~~~ fast fwd 7 mos.....11 mos. smoke free! & sticking!!. I've lost 40lbs. I currently run about 30 miles per/wk. w/8 being my longest to date (unless you count run/walk combos, which would be 13.8) trying to work through a 10K training program (I'm still very slow for a race I think!) Oh yeah, I had some down time in the middle of the summer for oral surgery (dental implants) & complications which, is healing nicely - probably largely due to me now being a non-smoker! (Doc told me that smoking reduced my chances of success by about 80%!) but it took a bite out of my running for a bit....
It's been a challenging road to better cardio/pulmonary health. I'm sure it's taken me much longer than a non-smoker would have. Sometimes, my self-talk is about patience & persistence w/myself.....sometimes I still have a bit of a dry cough...but, the more I run, the more I KNOW I can never smoke again! & I'm okay with that. yeah, I still have moments when I think about smoking.....it passes....& gets less frequent as time goes by. & Running has moved beyond just excercising to lose weight & clean out my lungs!!! I guess if you're going to 'switch addictions,' this is a good way to go!

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We shall not cease from exploration, and the end of all our exploring will be to arrive where we started, and know the place for the first time. - T.S. Eliot