Sangoma wan cards

[Ben Bullock <brb_(_at_)_meadvillelibrary_(_dot_)_org>]

Has anyone successfully used either the Sangoma S508 or S514 cards with
OpenBSD?  Sangoma's ftp site (ftp.sangoma.com/OpenBSD/current_wanpipe)
has a driver package (wanpipe-1.1.2.tgz) that will supposedly work with
2.6/2.7 versions of OpenBSD.  I'm just curious if anyone has direct
experience with these cards and what recommendations they might make
based on that.  Also, are there any other cards with built-in CSU/DSU
that are supported?

Thanks and happy new year!

-Ben Bullock