Love it on a boy.
I don't think Morgan is too terribly popular for either gender, at least not where I live (KS). I have only known 2 Morgans, 1 my age and 1 who would be elementary school age now. They were both girls, but I think I actually prefer it as a boy name. I also like Ashley and Kelly far better on a boy than a girl. I've known 1 male with each of those names. I don't think I'd be brave enough to use them, though. Morgan seems more usable than they others I think because it doesn't in the "lee" sound that comes across as feminine these days.
I much prefer Morgan on a boy.
Definitely works for either gender, but it would be very fresh and handsome on a boy. I like it!
My sister is Morgan, so I feel like it's a girl's name, but I think it also works for a boy.
The only Morgan I know is male!