I've been trying to carry it in my trouser front pocket and it kind of works, except it makes me walk with a 'bad boy' limp (you know, like you're carrying a knife in your pocket...)
I'm not putting it in a back pocket, because I don't know/trust the flex of the case and causing an LCD leak.
I really don't like the idea of a belt holster. because
a) it looks daft - like old man style,
b) it's on display, even if it's not the same size as an iPad, robbers will notice that you're carrying a big tablet on you
c) it just looks uncomfortable and dangerous to sit down with.
If you wear a suit jacket for work, I can see that potentially working, but for me, I think the best solution would be:
-Bluetooth headphones (sadly my Sony DG21B (i think) bluetooth headphones won't charge anymore)
-Something like the liveview
-Using a messenger bag or backpack.
I would probably look for a good Crumpler messenger bag for a DSLR with a couple of extra lenses and see if it will fit my Galaxy Tab.