I traded in my '06 TL after 2.5 years - I needed a change. The 2008 TL-S w/auto surprised me with how much better it is! A bigger engine, daytime running lights, auto headlights, active noise cancelization, better brakes, better transmission (love the smooth downshifts), back-up camera, etc. It rides and drives much better than my 06! In carbon bronze it's a looker, too. I'm extremely happy with my TL-S!
Rear wheel drive will be a plus when it comes, but no worries now - top-notch value.