I am designing a simple online shop application.
For an initial pilot I would like to avoid having to create a seperate UI for smart phones and desktop browsers.
As such I am looking to find out if there is something pragmatic that can be done to cater for both in the one UI e.g. perhaps if I am judicious about the design are there Jquery plugins/other options for having a one size fits all solution.
Look into responsive design. http://www.html5boilerplate.com offers a responsive template you can start with, Twitter Bootstrap and other CSS frameworks also offer you options for creating @media-query based layouts that modify based on the size of the display.