Features?

[JAmes Atwill]

Hi,  I've been playing a bit with aspell, and looking at other spell
checkers, and a feature that'd be fairly easy to implement, and useful
too, is the checkers ability to learn commonly made typos by the user. If

I type "fotz" when I meant to type "hello", and I tell aspell that I've
replaced the noted typo of "fotz" with "hello", next time it sees "fotz",
it could suggest "hello". 

Cheers!

        JAmes