You know what I'm doing? Using the Epiphany Web browser that ships with GNOME. In my case, that's GNOME 2.30.2 in Debian Squeeze.
Why? I've been having trouble with one of my most-used web-delivered apps in Firefox and Google Chrome.
So I decided to try Epiphany.
Sure it's slower than Chrome. But it compares well with Firefox. And I've solved a few lazy-developer issues (i.e. things that work well in some browsers but not so well in others).
I'll continue testing this over-the-web app with Epiphany. I hope it does more things well. If not, I'll go back to Firefox and Chrome. But if it does, I'll have some nice time ahead of me running Epiphany until GNOME 2.x bites the dust (which could be a very long time in my Debian installation).
One thing I'll be looking at is how Epiphany performs over time. Most browsers bog down in terms of memory usage and processes as the session continues. Both Chrome and Firefox can try one's patience in this regard.
I can't imagine that the Epiphany browser, known by some as the generic app name Web, will be anywhere near the same in GNOME 3. I could be wrong. It could be a whole lot better.