Getting hits on misspelling

I've been wandering why I keep getting hits on "todays dilbert", without actually checking it. It turns out, that I'm actually no. two on Google, with that search :) Unfortunately I'm only there because I've forgotten the '-character in "Today's", but it shows an alternative way of getting hits. It's obvious that I'm not the only one forgetting the '-character, and luckily the real Dilbert page is no. one on the result list, but image what would happen if it wasn't, and if it was your product that could be misspelled. It clearly shows that you need to cover all bases, and not just focus on getting your product on the first Google page, but look at what your users are actually doing. If your product is named "hoogabooga", will it be found in the results for "hogaboga"? This is especially important if you deal with clients that might not have English (or whatever language your site is in) as their first language, or might just be lousy spellers :)