I’ve been making mockups for my web design business Azunga and recently installed the .ttf’s and .otf’s of Google’s Font Directory. It’s nice to have the fonts installed so you can get a full feel of the mockup. I had to download each one, one by one, but I figured I’d help out and throw up the zip of all of them. I believe they are all open source web fonts so I hope Google or one of the authors doesn’t come knocking on my door.
Download the font files here.
Update (2/22/11): They add new ones all the time. This is just the ones from 10/2010 and back. There’s plenty more new ones but it’ll be a bit before I do an update.