In a little break from working with Silverlight and maps, I've added an iPhone/mobile-Safari interface to recipenow.net, at
There is at least one other mobile-Safari recipe site (already listed on Apple's iPhone application listing) - 101 Cookbooks - iPhone edition, and I'm sure there'll be more if sites like epicurious.com decide to tackle the mobile space.
More iPhone/iPod Touch ideas to come... thanks to Joe Hewitt's iUI js/css package for iPhone development.
NOTE: to access the mobile recipes from a PC, use the Safari beta or FireFox; for the Mac, use Safari (of course!).