Depending on what the dealer is charging you for running boards you could look at getting them from ebay. Volvo Nottingham sell them for £300 delivered. Several people on here have fitted - 4 bolts on each side. No need to lift car to it. Seems a dead easy DIY job.
The front parking sensors seem to be a dealer fit item only. No idea why - you end up paying to have the car stripped apart, which reflects in the price the dealers charge. They connect to the rear of the car and I assume are linked to the rear control module. The instructions are here...
http://vccs.volvocars.se/accessories...turecode=en-GB
On boot mats - I haven't seen anything suitable yet. The Volvo one is in two halves but I would prefer a folded in half mat that will cover the full boot when the 3rd row seats are folded away.
Bluetooth is the one missing piece for me - the fact it's not available already makes me think it needs some money invested to integrate with the headunit display. I'd be surpised if they add it now in isolation, so I would imagine that if they haven't done so by now it's because the headunit can't cope - so maybe if / when the car has a major refresh of the dash / radio it will follow....possibly that is what's coming with the MY2011 but who knows.