rachel123 - 10:42 pm on Jul 19, 2011 (gmt 0)
I used to do it too - an odd misspelling here or there (my main keyword is a compound word with two s's - actually, a lot like "misspelling" - easy to misspell (missspell, mispell, miss-spell, mis-spell)
I found it much less effective once google started correcting searchers' spelling for them. It's a trade-off. The risk is that a searcher who comes across the misspelling may think you're unprofessional. The traffic used to justify that. It doesn't any more. YMMV.