"Ephedra spam is back (FM407, Flower Mound & Highland Village)"
Haven't had a chance to grab them yet, but I've seen a handful of amateurish hand-made signs that say something like "Ephedra is back, 817-913-9967, I lost xx pounds in xx days" the last couple of days.
No luck doing a reverse lookup on the phone number, other than confirmation that it's a wireless number from the Arlington area (or at least that's where it was originally issued).
It looked like black paint (or magic marker) on posterboard, attached to a pair of sticks. Today's rain might have made them worthless anyway, but I haven't gone to go look at them again today.