Myxer is a pretty cool service. I had some exposure to the company prior to CES and in fact the Geek News Central Podcast Introduction is available as ringtone on the service.
MyxerTones is a great way to make and share ringtones and wallpapers you can get thousands of ringtones and wallpaper from their website and most are available at no charge. You can even make your own ringtone to share with your friends and family.
They are integrated such that you can deliver content from your webpage or myspace account.