Er, they don't take anything from you if you don't allow it
They don't have access to you files and don't collect any usage information if you turn "Help make Google Chrome better by sending usage statistics.." off, which it is by default.
Now the only information they're "collecting" is it sends what you type in the Omnibar to suggest the site you're looking for(and this is not sent with the Unique ID, that's only used in crash reporting and updating). If you don't like this, you can turn it off in the options.(edit search engines > uncheck "Use a suggestive service to check URLS.."). I'm also pretty sure that it does the same whatever your search engine is, so it'd query Yahoo if that was your search engine.
Incognito mode downloads cookies etc when browsing and deletes it when you go back to normal mode, it's the same as IE8's InPrivate feature, and many others. What's not so incognito about it?
However hopefully the security flaws will be fixed ASAP.