I would encourage you to consider a second wireless router, not a wireless bridge like the devices often seen being advertised to connect game consoles, etc.
With a wireless router you can expand as in connect more than just the blu-ray player to it in your entertainment system. My setup has my Denon 3808, Wii, Xbox, BD55, an extra network cable just in case I need to plug something into it in the front room and it acts as a wireless repeater for all laptops that we may use in the front room home theater area. Way more flexibility and for me value by using a second wireless router.
I actually have 3 in my home. One in the back of the house to which a Sony 350 is attached, kids use it for access for their laptops in their rooms, another Wii attached to it. One in front room as already noted. The third one is the "Master" router and it is in my home office.
I use 1 Linksys WRT54GL and 2 Buffalo WHR54G's. But all Linksys wrt54GL's would work just fine.
By the way the WET Linksys mentioned above is more like a second router than the wireless bridge adapters I am referring to.
E.B. White said, "I arise in the morning torn between a desire to improve the world and a desire to enjoy the world. This makes it hard to plan the day."