Most of the US companies agreed to switch to a universal charger by 2012, with the notable exception of Apple, which will stick with their current charger.
One thing I find interesting is that the EU companies chose micro-USB as the standard. I know my Motorola and Blackberry use mini-USB, so I don't know if they use micro overseas and mini here or if they plan to switch to micro in the US. The link below shows the difference between micro-USB and mini-USB:
http://gizmodo.com/5154851/european-...phone-chargers