ergophobe - 8:32 pm on Jul 30, 2010 (gmt 0)
Those seem like high numbers for IE and especially IE8. I guess it must be all the corporate users.
Anyway, I'll just throw out that since Chrome and Safari are both webkit browsers, they should render the same. So if you have one on the list, you'll likely get the other "for free".
Generally speaking, for most situations, that's a manageable list. I might put IE6 on the list for testing, but just shoot for limited compatibility if necessary.