I don't know if this is already a known fact, but MOON PHASE linked
this news today, announcing a late friday night radio show
Lucky☆Channel (らっきー☆ちゃんねる) which is going to be held before the actual spring airing of
Lucky☆Star TV anime series on Radio Kansai's Anitama every friday from 24:30 to 25:00. It's probably going to run until the anime starts. The radio show is taking mail letters on which they'll respond.
EDIT:
http://lantis-net.com/rakisuta/
Here's the first episode of it.