Yes, same problem. Same two widgets were working this morning and not this afternoon. Tried on EDGE and 2 wireless networks, so that's not the problem. Mail, Safari, and other internet-based services not effected. Then, randomly, weather began working again while stocks stayed broken.
I took the extreme step of restoring my iphone (after backing it up on my mac). It worked - both widgets were fully functional after the restart. Currently waiting for all my data to re-sync.
Very annoying.