I have a Innocase Surface - Sapphire Blue. I could not handle the phone without such a case.
I am far too clumbsy and drop the thing way too much...
This case has saved me 6800 several times. I also owned a similar case for my 6700 as well, which it also was quite useful for the same purpose!
And for the record, I am will Bell Moblity in Canada, so the cases are manufacturer specific, not carrier...