Demos are your best bet. People actually have to see it work to get how nifty it is. Grab the iconic characters, and either download The Darkest Hour, or convert an existing (short) d20 module you like (Goodman Games just put all their 3.5 Dungeon Crawl Classics back up for download, and AEG's old Adventure Boosters are still available). Then put yourself on your FLGS' calendar on a monthly basis.
Iconics... I forgot all about those. I sat down, last night, and made a new party of characters. I'll fill in the ranks with the iconics, though, since I didn't make one of every class.
As for adventures, I am planning convert a section of Keep on the Borderlands today to grab the old-schoolers. I'll probably also slice off a piece of Undermountain for a mid-level session. Might convert a high level 4e module, too, to show off how versatile the NPC design system is.
I have a group of new players for a regular campaign. This one is a little more ambitious -- I have Ptolus and have been dying to run it.
If you've got a convention in your area, that's even better.
I have a few conventions in the area. Two of them are good. GAG and Simcon. Rudicon, from what I am told, is basically a ghost town, these days. Sadly. It was my first con...