I'm in the same boat.
Actually, I don't really need an internal ADSL modem per se,
primarily I just need a "managed" ADSL device from which I can
automatically obtain line quality and carrier loss information via
SNMP or a serial port or some other OpenBSD-compatible mechanism.
I had one of the little Cisco ADSL external bridges (675?),
but it eventually melted down and just stopped working entirely.
Are there any plans to import "ueaglectl" to OpenBSD?
http://damien.bergamini.free.fr/ueagle/
Thanks,
Kevin