I think it would help the rest of us to know what you are trying to accomplish.
What type of wall warts are you trying to eliminate? Ones that output AC, DC, 5V, 9V, 12V, 16V ? What types of devices do you need to provide power to? Where are they located? Around your kitchen counter? In a can with your home automation controller or alarm panel? All over the house? Do you want to replace the wall warts with some other power source, or just hide them from view?
There are different solutions depending on the specifics of what you want to do.
Edit: Sorry - somehow when I initially read your post, I missed the fact that you are asking about handling wall warts inside the can itself. Makes much more sense now!
I didn't use one of these Leviton structured media power supplies in my installation, but I have to admit they help make things much neater.
http://store.leviton.com/Versatile-Supply-Structured-Cabinet-47605-PSC/dp/B0076ZTEZY#