EDIT
STACKO is now available for download from the Marketplace.
For features/suggestions please visit http://stacko.uservoice.com/
StackO is a StackExchange browser allowing you to search the whole range of StackExchange family of sites including StackOverflow, ServerFault, SuperUser, Mathematics, Gaming and many more.
StackO allows you to "Watch" the questions of your choice to keep up-to-date with the status of a question. Giving you direct access to the questions that interest you most.
Support/Suggestions
All suggestions will be gratefully received (good and bad).
Unfortunately I'm unable to post images here due to a lack of reputation points (oddly). If you want to see more please visit my blog http://www.ryantomlinson.com/
How Much Is It?
It's 100% absolutely and completely FREE and always will be!
Platform
Currently only available for Windows Phone 7
Support/Feedback
Please leave feedback here. It will be very gratefully received. Ideas and suggestions will be best voiced at http://stacko.uservoice.com/