Sounds like a blast... I used to be a pretty good swimmer. I placed in all 4-events in counties during my senior year of HS (although that was when I lived in a lame ass county in FL).
I've always wanted to do a tri, but two things have precluded me:
1) The cost - those events are expensive!!!
2) Running - even though I ran track in HS (hurdles), distance running was never my thing.