What is purpose of Titan's odd-shaped USB port?

[dalsik]

I was just upgraded from a 6700 to the 6800 and was told that my old accessories would work on the new phone. Yeah right!

I went back and got the USB cables that come with the 6800 but wonder what the deal is with the odd-shaped mini-USB port as I can still charge my phone with my standard mini-USB chargers? I see that they moved the audio connector from the phone to one of the USB cables.

Am I damaging my 6800 by using my old USB calbes?

Thanks.