Matt Campbell has reminded me that I haven't been keeping up with posting news about Mozilla's latest. He is, as usual, right on target. Here's a link to the Firefox pages touting the public release of Firefox 3 Beta 2.
IE 8: Ars Technica has a good look at what is coming in Internet Explorer 8. There is a short bit in there about W3C compliance and the battle in the EU with Opera too. And it looks like we will see a beta for IE8 in the first half of 2008.