Multimedia Dock Flaw?

[bullittbob]

Why is there not capability to sync and charge with AC at same time. If I use it to sync then my charging takes much longer with just USB. If I use AC then I can't sync. Why not have AC and USB to do both simultaneously?

 

[takeshi]

There's only one microUSB port for whatever reason. Probably because someone else would complain about the added cost. Personally, my dock's nowhere near a PC (everything sync wirelessly anyway).