Just in case any one else is considering the Garmin Forerunner 10, I thought I'd write down my impressions. Bought it for $130 on amazon (saturday delivery FTW) and tried it for the first time today. Overall, I'm very pleased with the purchase. I really liked having the speed feedback right there on my wrist. Also some nice reporting features on the Garmin Connect website (see below). I would say only downside was the low battery alert at around 5 hours into GPS usage... but it didn't actually power off, then again I was done sailing for the day at that point.
Product specs on Garmin website
You can see my recordins for today here:Part 1Part 2
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'76 H16 Flamer Sails - restored and sailing
'84 H16 Blue Hawaii Sails - under restoration