Where have you been? This has been discussed to death. Apparently the PS3 does not have the proper HDMI 1.3 chipset to bitstream the advanced lossless codecs.
But the good news is that the PS3 does decode them internally and according to Roger Dressler of Dolby Labs, it decodes them 100% accurately (at least for TrueHD). Which means you lose absolutely nothing using a PS3 as your BD player.
As for your receiver point, I agree that buying a receiver with the advanced codec decoding on board is slightly pointless if using a PS3, but:
- Most receivers from Onkyo, Denon, Yamaha, Sony, etc are going to offer this on newer HDMI switching receivers.
- Going with a higher end receiver results in better performance, more wattage, more features, etc.