Most excellent. How you do that?
Look at the source for the pic I posted - it looks like:
< img src = http://radblast-aa.wunderground.com/cgi-bin/radar/WUNIDS_map?station=MLB&brand=wui&num=6&delay=50&type=NCR&frame=0&scale=1.000&noclutter=1&t=1202847339&lat=0&lon=0&label=you&showstorms=0&map.x=400&map.y=240¢erx=400¢ery=240&transx=0&transy=0&showlabels=1&severe=0&rainsnow=0&lightning=0" >
I looked at the page you linked to (I use WUnderground as well), and then VIEW SOURCE for that page.
Then I find the tag that resembles the form above (search for IMG tags with RADBLAST in them) and copy the whole tag.