jLoki:
I'm using one of the new Ricochet modems with 3.4-R, but
that's just using the serial interface. Sure you don't get
the faster data transfer rates, but it does work quite
reliably (assuming you don't go through WorldCom). I do get
11KB/sec which is kinda slow, but it works. I was going to
look at back porting the umodem driver in -current and
getting it up and running on my 3.4-R, but I haven't looked
at that yet.