Steve,
Last night I installed everything and ran into a problem with ASLerrors.

Today, I started with a known good ASL install and overlayed the DVSwitch stuff. No errors on installs. This is the closest to working so far.
I'm now having a dahdi related error on ASL startup. I did do a /usr/src/asl-dahdi-linux-2.11.1  make (no errors) and make install (no errors).
Here's what I get from asterisk -cv :

[ Initializing Custom Configuration Options ]

[Aug 10 11:21:52] NOTICE[13888]: dnsmgr.c:394 do_reload: Managed DNS entries will be refreshed every 300 seconds.

[Aug 10 11:21:52] NOTICE[13888]: cdr.c:1416 do_reload: CDR simple logging enabled.

[Aug 10 11:21:52] NOTICE[13888]: loader.c:874 load_modules: 56 modules will be loaded.

............[Aug 10 11:21:52] ERROR[13888]: chan_dahdi.c:11711 setup_dahdi: Unable to load chan_dahdi.conf

...[Aug 10 11:21:52] NOTICE[13888]: chan_simpleusb.c:4242 load_module: Unable to load config simpleusb.conf

[Aug 10 11:21:52] NOTICE[13888]: chan_usbradio.c:5790 load_module: Unable to load config usbradio.conf

....[Aug 10 11:21:52] ERROR[13888]: codec_dahdi.c:432 find_transcoders: Failed to open /dev/dahdi/transcode: No such file or directory

Tom