I have removed most of the apps associated with the channels from the Audrey except for the Filmstrip app (only app you need for static Channels BTW) and have found a couple useful url's and created a couple web pages that my wife and I use to provide more functionality to our Audrey.
Most of the mods I have done have been done with my wife in mind since I want her to use Audrey as well.
I fixed up a nice .countertop page that has easy to use links for starting phjuke, shell and an easy button for rebooting the Audrey.
I have also created a webpage that has a form frontend that allows us to keep a Grocery List on the Audrey and
sync it to our Palms before we go shopping. The syncing is not done from the Audrey unfortunatly since I use hsconvert (win32 app) to create a .pdb for HandyShopper. Basically I just host a page on my linux box and it takes inputs and creates a .CSV file that hsconvert uses to create the HandyShopper database.
I have been using mobile webpages (pages designed for pocketPC's and Cell phones) as channels as well, since they are designed for smaller resolution devices and fit on Audreys small screen.
examples of mobile webpages can be found at..
one of my favorite URL's that works well as a channel is http://yp.mapquest.com
Its a yellow pages guide.