I have a Diamond USB modem that gets attached as a ugen device,
not as a umodem (both with the 1.5.2 kernel I'm running and with
-current as of the most recent snapshot).  Is getting this device
recognized as a umodem just a matter of adding the right information
to some table somewhere, or is it really a usb-connected winmodem
or some other such ugliness?

The related dmesg entries are:

uhci0 at pci0 dev 7 function 2: Intel 82371SB USB Host Controller (PIIX3) (rev. 0x01)
uhci0: interrupting at irq 10
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ugen0 at uhub0 port 1
ugen0: Diamond Multimedia Systems Inc Diamond SupraMax 56K USB Modem, rev 1.00/0.01, addr 2

Thanks.

	--Ed