I Hate to Keep Harping on This, But...
Saul Bass designed his original AT&T logo in 1983, and it has remained more or less intact until this year. Branding specialists, more than anyone else, know that logos must be used consistently, and that any inconsistency in the application of a company's logo degrades the brand identity. It's important to design a logo with staying power, and not a trendy one that relies on the current technology. As we all know, new versions of software roll out every six months, so in less than a year, something else will be trendy, and your logo will be out of date.
Compare the UPS logo with AT&T's; you can see that gradients or blends were used to make the highlights and shadows on UPS's mark, while AT&T's mark appears to be executed using the latest 3D ray-tracing technology. In a few months we may see a new logo executed using technology that makes AT&T's logo look out-of-date. Remember when the blue-and-white iMac or G3 computers were the coolest thing? Compared to today's G5, they look old. Computer technology has a shelf life, but brand identity must not.
Here is a link to a PDF listing the evolution of the AT&T logo. The new AT&T brand avatar is presented in 3D and (in the upper left corner) as line artwork; two logos means less memorability, so why not just have one? The simple one.
October 13th--Simplicity in Logo Design link
November 21st--What Do You Think of the New AT&T Logo? link
November 23rd--Reaction to New AT&T and UPS Logos link
November 25th--AIM Jumps on the Bandwagon and "Rebrands its Avatar" link
December 1st--Judges Select Logos for LogoLounge III Book link