You can now spellcheck your comments (and I can spell check my posts!)
When you click the “Check spelling” link above the comment window the spell checker will kick in – it’ll highlight questionable words and show a pop-up of suggested alternatives. When you click on the correct spelling of the word it will make the correction – but you won’t see the correction right away – I think this is because of the Ajax Comment Preview plug-in.
In any case, when you click on “Resume editing” the corrections are made. Even though this isn’t ideal (I wish the text was updated immediately) it does at least show you where your typos are!
I may shut the Ajax Preview function off – I think the Spell Checker adds more functionality.
I used the GÃ¶SPress plugin for this – available here.