Here's the latest OpenBSD Mozilla-firefox package:

Mozilla-firefox-2.0.0.5.tgz

along with the development sources: (optional download)

Mozilla-firefox-devel-2.0.0.5.tgz

All Mozilla-firefox sources were compiled with the following flags:

CFLAGS="-mcpu=xscale -mtune=xscale -O2 -pipe"
CXXFLAGS="-mcpu=xscale -mtune=xscale -O2 -pipe"

The Java and Flash plug-ins I've previously compiled work flawlessly with this updated version.

Excellent!
Does it run under 4.2 beta?

how does it run? are theload times still long? is it fairly smooth once loaded?

I've been running it under 4.2-beta without issue.

If you previously had Firefox installed then the initial run up of the updated version can take awhile since Firefox checks your installed plug-ins for compatibility. After this initial run it loads with about the same speed as previous builds. Page rendering times are about the same, but it's never been unbearable.