I can feel clear kicks, have been for about a week (I'm 21 wks). It was like, nothing, and suddenly, Oh! I can tell what that is! =) I wasn't sure if I would be able to, but it was so obvious. She kicks mostly when I am sitting still or crunched up in my tummy (slouching, laying on the floor, etc.). Claustrophobic like her mommy, I guess. =)
BF can feel them too. He got a chance to feel some good kicks the other day.
Oh, and the ultrasound -- we had one (the only one) last week and she was flipping around all over the place! =) Very quick and easy movements.