Turtle: I recommend you go to
Runner's World Smart Coach and plug in what you are training for, and use "maintenance" when asked how hard you want to train. It will give you a long term workout that slowly peaks and drops down.
Gruecd: We need more info on how your swimming is going! Take it from me, trying to train for a HIM in 6 weeks is not all that it's cracked up to be. I do believe I could have had a really good race this weekend had I not been injured, but my training escalated waaaaaaaay too quickly (distance on bike increased 20%+ per week, and run was over 15%) which I'm certain caused the injury.
Hammer: There is no need to build up to any more than a 5 mile run. Slowly increase your mileage each week = don't increase more than 10% per week (do as I say not as I do!), get in one speed workout per week max, and have a blast!
Good luck to Dexter, Turkish, 2Young and Workhorse this weekend!
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My update:
I did my final workout last night. It was a 100, 500, 1000, 500, 100 swim that felt pretty darn good. More importantly, there was zero new damage to my shoulder!! Also good, as my calf feels even better today. I know I'm going to race the swim this weekend, which will be nice as I've never raced that far, and it will be good for me to get in another open water swim. I also know I REALLY want to race the 56 mile bike ride. I've never hurt my calf on the bike, so hopefully I'll be able to say that next week. The run is also a a 4.36 mile loop done 3x = I won't be in the middle of nowhere IF I try the run

I'm going to play it by ear, and just see what I can do. My expectations are that I'll just finish the swim. Anything I can do beyond that without further injury will be awesome.
The weather report right now =

The expected temp at 5 am is 40 degrees; 8 am is 50 degrees and high is 74, which is flippin' freezing for down here!