GoogleBot has visited my site more than 300 times but site:mysite.com shows only result of previous owner. It is not updating to my site.
What answer are you looking for? Do you want us to gather up in a circle around a fire and prey for google to speed up the proccess of updating your website? Just wait a bit more and have patience and everything will update.
It would be helpful to have a little more details to be able to better assist you. When did you take the site over? Did you change all or most of the content? What is the URL to ensure you don't have "show stoppers" in your code making it impossible for bots to crawl? You can't scream help, but not be helpful in assisting with the necessary details to make an informed decision. Barring answering all of that, have an XML sitemap created and submit it to Google Sitemap.
Their updates only happen every so often. If you catch them at the right time you get your information updated if not you just have to be patient.
google updates on a daily basis, its only 'toolbar pr' and backlinks that update every so often. are you sure your using no kinda 'no cache' tags?
This was the part I was referring to. Sorry forgot to actually put that in there. Thanks for catching that. Kevin