[typo] Validations on Sidebars

[Paul Hart]

All,

In my opinion, it would be very helpful if sidebars had the ability to 
perform validations on the admin side. I mentioned this to Piers on his 
website, and have now created a UserStory to go along with it:

http://www.typosphere.org/trac/ticket/830

 From the perspective of building a friendly blogging system, it would 
make sense to build in some sanity-checking where applicable.

Comments anyone? I'd be keen on doing this myself, but I'm not sure how 
in-flux the sidebar code still is, and I don't really have any free 
cycles at the moment :(

Paul