Hagrin.com

With the new wireless technologies being adopted by the masses, it's important to make sure your website displays properly on the different wireless devices. IBM has written a guide to retrofitting your web pages to display correctly and aesthetically pleasing on wireless devices.

As a side note, the Opera browser gives you the ability to view a website in "Small Screen" mode by choosing View and then Small Screen. Thsi will give a web developer some insight as to how their site will view on a wireless browser. Great feature and another great option Opera offers that the other "big" browsers do not.