rounded corners ?

rounded corners ?

Hi,
 
I am new to jQuery (loving it so far!) and I'm not sure if this post is an 'idea' or a 'question'.   But here goes.
 
I'm a fan of rounded corners as they make a big (if subtle) difference to presentation quality.  Is it possible to use jQuery UI to display rounded corners on various things, such as input boxes, tabs, divs, etc.?  Nothing too amazing, just simlpe rounded corners like those on the navigation bars of this web page.
 
For example is there a 'rounded: yes' or 'corners: rounded' option on some of the UI widgets?  If not, may I propose it as an idea?
 
 
Thanks,
Owen