I have been playing with Kazehakase, a very lightweight browser with some nifty features. However the version in the Ubuntu Hardy repositories has a serious bug: it crashes every time you try to open the Preferences dialog. This bug has been fixed upstream, but I couldn’t find a deb for Ubuntu with this fix. So I built my own: kazehakase_0.5.6-1_amd64.deb
I hope others find this useful.