If you sell things online, it is very important to have a mobile version of your website. Having a mobile site used to be negligible, but this is 2011 and more and more people are getting Internet-capable phones or devices like the iPad, iPhone, iPod Touch, etc. Even if you don't sell anything and just have advertising on your website, having a mobile site which accentuates ads or any desired area can greatly increase revenue, fast. If you're interested, send me a Private Message with the details of what site you want to optimize for mobile, and my partner will build you a sample for free! No risk, no obligation. If you are a serious webmaster, you have the obligation to at least check this out.