I have the same need.
The info in the dashboard is not personalized for other users and potentially more confusing if they don't know about wordpress (i.e. my grandma). Let me elaborate:
The links under "Welcome to WordPress" assume that you have all the capabilities. Lesser roles still see the links but they'd get a "You do not have sufficient permissions to access this page." If a user don't have rights, then the link shouldn't be there in the first place.
The "WordPress Development Blog" and "Other WordPress News" are good for "Administrator". Other people can go to planet.wordpress.org if they want to read up.
What I really want in _my_ dashboard is a personalized information from my point of view:
1. All of my post, comments on my post, link to my post, and short cuts to things that I can do (per my capabilities).
2. All of other post, comments, links, etc. that I have permission to view/edit.
3. Blog stats.
Blog stats could be more elaborate from admin:
- user info: last login, last failed attempt to login.
- page/post info: number of hits, etc.