Today Firefox 3.5 has been launched with success (1 million download in the first two hours).

Three weeks ago, Safari 4 was launched and get some reasonnable success (11 millions download in 3 days with 6 millions for windows plateform).

Opera 10 is about to be out (it is still a Beta for the moment)

IE 8 is already out since March

Google Chrome 3.0 is in preparation

The other news to mix with that is that

Microsoft will not ship Windows 7 with IE 8 in Europe ; it will be up to the OEMs to include one or more Browser of their choice !