good deal, good deal. I'd say try and find a 1/2 sometime in july/august. That would be your best bet to get some training in after the mary. Since you have about 7 months until the marathon, you obvoiusly have a lot of time. Make the marathon your focus and once that is over worry about the half. Let's say you take January 1 - April 25 for your marathon training. During that period, swim 2 days per week and ride 1 time. Make that ride 30-40 miles, maybe up to 50 if it doesn't take too much out of you. Make it a very aerobic ride, just to get out there and make sure your legs don't forget how to ride. I'd say swim 1500-2000 yds for the swimming. Again, it doesn't hgave to be hard, but since swimming is all technique, it can leave you pretty quickly. I'm going to assume a 1500 yd swim won't kill you. Maybe just work up to 1500 by the time the Mary hits. You should be able to tackle that training while training for the Mary. Once the mary comes and goes, you will have a running base that will carry you through the Half. trust me on this one. I carried a Half IM base worth of running through 6 months of no running to a 10k PR. I'd say ramp up the cycling and running once the mary is over and run maybe 2 days a week. Again, just to keep your legs moving (running wise). I have no doubt you will knock both out of the park. Especially becuase you have a running background. good luck. sorry for making this so long. I'm wordy.

I'm bored at work and my mind if on overload, so here's some more stuff. Doing weights is a good idea. 2-3 a week can be very beneficial. I don't know what you plan on doing for weights, but I heard something a while back that was very interesting regarding weight training. In our sport, we naturally build endurance by going out and swimming, cycling, or running for a large amount of time, so why do we hear of workouts for triathlon of 15-20 reps at lighter weight? That's good to keep strength up during season, but you want to get stronger right? For get that 15 rep crap! For starters maybe, but once you get in there for 2 weeks or so, let 'er rip man (within reason, ofcourse). Get in there and really lift some weight. I'd focus on legs only or make that the 75% focus. I've gotten the same "bulk" from swimming as I have from lifting weights for upper body. Do squats, lunges, step ups (those 3 are really good for bike strength) leg curl and leg extension are good too.

One other thought on overall training for the Mary and Half. Give your body a few weeks to adapt to the running while mixing in swimming and cycling. You wil soon realize that your body can handle that much "stress" it just needs a little while to adapt to it.

I'm sure I could go on, but I'll stop here.