Below is a spreadsheet that shows a few approaches to "predicting" your triathlon run time based on a recent standalone run result.
Email me if you have any questions/comments/corrections: email@example.com
Here are a few more sites of mine:
-Using a Garmin 310XT with a PowerTap:
-"Enhanced" race results from a few (and growing number of ) IM races:
-My Ironman Canada 2010 race report (and yes, I used my 310XT/Powertap, the Predict your Triathlon run spreadsheet and analyzed things after with the enhanced race results!):