Wireless Desktop Probs, try Belkin's Powerline Kit

That link works.

If you're asking if you go wireless with the BluRay, I would say no.  Anytime you hardwire you're going to have better transmission.  I have a Samsung BP-P2550 and it is hardwired.  I went through three of Samung's players before landing on this one for good (BD-P1200, 1400 & 1500).  All these player were flawed to some degree with lock-ups, freezes and poor quality.  I bought the 2550 because it looked good and has the Reon HQV processing chip which makes SDs up-convert nicely.  The reproduction on SDs is excellent.  This player has played everything I've thrown at it and I will use it until it melts down.  

The negatives of bridging your router signal to the BDP are intermittent connectivity issues now and then and streaming degradation.  Here's a scenario you don't want happening.  You're updating FW on the BDP via wireless and your connection takes a signal dump in the middle of the update.  This happening can very well brick your BDP.  The other issue with wireless to the BDP is that your streaming can suffer and give you a lesser quality reproduction, thus giving you a wrong impression of the BDP itself, when it is actually the signal only that is flawed.

I've read about horror stories of people bricking thir players due to a mishap with installing FW updates.  I would spend the extra dollars to have it hardwired.  And, if you do decide to move that direction, router, then I would look at wireless N.  Wireless is a great technology, but I don't think it should always be applied to every bit of hardware that can potentially have it built in.  Some technology, like BDPs that require FW updates, should be done direct considering the downside.  I personally burn the ISO to disk and update that way.  This way I have a disk to recall if I want to revert back to an earlier FW update if needed.