Some call this a weed. I call it salad. Purslane.

Portulaca oleracea.

A big climbing weed called, some say, Trumpet Vine. It likes to climb up the downspout and onto the roof. But it's never bloomed...

Campsis radicans is the Latin name for trumpet vine. I'm not totally sure that this is the correct ID. More research is called for.

This stuff is everywhere. It's called dock, says gaiagardener. Rumex obtusifolius.

Is this what everyone calls crabgrass? I'm guessing that Lori KP (see comments) is right: it's goosegrass (Eleusine indica).

This plant is close to 4 ft tall. No sign of a flower. I so want to hack it down. But I want to see if it blooms. (7/8: Dug it up. I'll never know.)

(9/26/09 update: Eastern redbud seedling)

I still have no idea what this is. It's not a tomato. Looks like a gigantic marigold without the flowers.

A tender grass. Seems to like water.

I think most people would call honeysuckle a weed. I really need to think about pruning this thing.

?? Between the driveway and the carport. Now THIS is a hardy weed.