Man, 7 hrs per day in commuting time? That's alot. It's basically what one would ride if on a tour, timewise. My commute was 20 mi each way w/a 500 ft drop in and a 500 ft climb on the way home. I spent almost 3 hrs per day in the saddle and you're looking at twice that. Don't know what to advise except you may want to do Monday, Wednesday, Friday leaving Tuesday and Thursday for recovery days. Lots of carbs, protein and especially water. But, as you're an experienced cyclist you know that already.

Maybe get a good, cheap cyclocross and trick it out for commuting w/rack/garmentbag(for suits)or panniers(for t-shirts, jeans), headlight, blinkies, etc. Would recommend one of these: http://www.bikesdirect.com/products/..._cross_cx2.htm as I've got one and it's got over 12,000 miles on it w/no problems. Changed out the stock tires for some Schwalbe Marathon Plus 700x28mm and have been good to go ever since. The stock tires gave me 2 weeks before flatting...I've had 1 flat and 1 slow leak on the SMPs.

You'll be ready for the RAAM in short order that's for sure.