Did 30 minutes in the pool. I counted my laps for 5 minutes after having warmed up for 20 minutes. I was able to swim 225 yards in those 5 minutes. That means I would swim a mile in just under 40 minutes at that rate. However, I doubt I could keep that rate up for a whole mile at this point.
While swimming my mind tends to wander, so it was pretty tough for me to keep count of the laps without losing track in the middle. Because I'm such a dork for gear, I've been oogling these two devices:
The Finis Lap Track
SportCount Lap Counter
It would be neat to accurately keep track of my times in the pool, but I'm not sure if I want to spend more money and haul around yet more gear. I think between the two I'd be more inclined to get the Finis Lap Track because I think wearing a stopwatch on my finger would drive me nuts. With the Lap Track you just push on its face when you are at the end of the pool. Wearing a stopwatch during practice would be something different between when I'm training and when I'd actually do the triathlons. Small, but I know it could be a source of at least minor distraction during the actual events.