There's Zappadan on Facebook, Instagram, X, Reddit, and of course in the blogosphere.
Zappadan can be found around the blogosphere at Mad Blog Media, Arts Meme, And Now It's All This, eVille Times, You Call That News?, Cirdec Songs, Ketchup Is A Vegetable, We're Only In It For The Music, and archival posts at Fried Green al-Qaedas, Mark Hoback's blog. Mark was there at the beginning, along with Blue Gal when Zappadan was birthed.
I've written extensively for the celebration in the past. It's all right here. There's even a few Zappa posts in addition to Zappadan content, and that stuff is included here.
You can listen to my personal favorite Zappa record at YouTube.