porting acx driver from dragonfly to fbsd?

[Anton Shterenlikht]

I note DragonFly have acx(4) driver, which supports some acx100
and acx111 wireless chips:
http://leaf.dragonflybsd.org/cgi/web-man?command=acx&section=ANY

There is a FBSD port for acx100, which is broken for versions > 6:
http://www.freebsd.org/cgi/cvsweb.cgi/ports/net/acx100/

but no FBSD port for acx111, though one can presumably start it from
http://dev.kewl.org/acx100+111/

Questions:

1. Any reason why acx driver exists on DragonFly but not on FBSD?

2. Is it possible and practical to port the dragonfly acx(4) driver
to FBSD?

3. What is easier - to port acx driver from DragonFly to FBSD, or
to develop a port for acx100+111?

4. Provided the acx100+111 FBSD port is available and working, what
is more efficient - using a kernel acx module or acx built from ports?

many thanks
anton

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 928 8233 
Fax: +44 (0)117 929 4423