I know that I'm behind the times... but rounded corners without using images on web pages
Looks like I'm a couple of years behind the trend, but I've had it pointed out that you can achieve nice rounded corners on web pages without using images.
There are possibly buckets of articles about this on the web, but these are the solutions that I've come across and implemented.
Nifty Corners / NiftyCube by html.it - Nice articles about how to achieve this by using HTML markup and CSS followed by a complete solution using a Javascript functions to apply the additional markup to any element.
RUZEE.Borders by ruzee.com - Used in a number of the blog template on Community Server, some nice additions like adding glow and fade effects.
If you have any other examples the please leave a comment!