wrote:
It looks like it may be speedwell.

http://www.weeds.iastate.edu/mgmt/qtr99-1/speedwell.htm

No, the flowers are wrong. (I've been waiting for the answer because
it's all over my neighborhood also). Flowers/seeds form at the very
top of the plant, turns very fuzzy white similar to dandelion. An
infested yard looks like snow. Thankfully it only lasts a few weeks
in late spring. Seems to be a southern plant but is not shown in my
southern weed books.

Red