I haven't seen much about this feature yet, so I figured I'd put it through its paces and share what I found. WYSIWYG editing on iOS devices is finally here! For a long time, contentEditable support has been lacking on iPads, iPhones, and iPod Touches, and it's been slightly annoying, as the only way to add richly-formatted text on these devices was doing a two-step through finding the carat characters and writing the HTML yourself.
Plus, some WYSIWYG editors (like TinyMCE) simply disabled the WYSIWYG from attaching to a textarea if it detected an iOS device. No longer, however: I've tested CKEditor (latest nightly) and TinyMCE (latest nightly), and both work perfectly (surprisingly well, in fact!) on the iPad running iOS 5 beta 6: