There is no specific place for one, but you could use a Camelbak Unbottle in any bag without a specific bladder section.

Yes.

This is a backpack and does not have the fittings to attach to a rack safely.

SOme of the little loops are highly reflective and there's plenty of scope for sticking lights on to bits of cord and strap on the pack.

Yes, Ortlieb products are covered by a 5 year warranty.

The completely black model is not available until February.

The white one is labelled white/black not sure why the yellow is not yellow/black.

We stock the White/Black version of the bag that you have linked in your images. These are currently in stock.

I see all of the colours on the Ortlieb website seem to have these so most likely 2012 improvements that will - in time - trickle down!

I've just received the White with Logo Velocity from Wiggle and it is indeed slightly different to last year's model (which my brother has).

There are now additional loops on the front you can fasten/clip a light to it and the internal pocket is now fastened at the top of the stiff plastic liner. The pocket has a few compartments and is ideal for wallet/phone/keys etc. Finally, the waist strap is now just a bit long, rather than the absolutely massive HGV tie-down strap that went before