NVidia's Tegra Coming From a Top 5

"If you want to get HD in your handheld, NVIDIA's Tegra processor is the hot way to do it at the moment, and we've got reasonably concrete sounding rumors from disparate sources that a handset containing one of the chips is currently under development by a "top five" smartphone builder (we're guessing it's not Apple)"

What really is a "top 5" manufacturer? Is this sorted alphabetically? If so then I really need to get my "AAAdvantage Manufacturing" subsidary up and running... All kidding aside, NVidia's Tegra may be an interesting addition with Windows Mobile rumors swimming around it.