Hi. I just made some changes on my web site (PR4) 3 weeks ago. Google visited me several times since then but I am still listed (I appear in searches) with the old page content/keywords. Why?
It means that visit of the google bot is not equal with update in search results. Your page was checked, information was gathered you need to wait until update happens. Google treats differentpages in different way.
Sometimes, new pages are indexed within an hour after the visit, but also, it may take a month or more. If Google visited you, then you just have to wait, because eventually, your pages will end up in the Google index.
If you want to get re-indexed with your updated pages, just submit them to social networks such as LotText, Propeller and Digg. Then Google crawlers will be on your site and you will see the results after short time.