The so-called Nokia Mural flip hasn't been heard of since May. Was it cancelled? Apparently not. There's a dediceted page for it on the Bluetooth SIG site, where we clearly see the phone with an AT&T logo. The question is: why is it still not available for purchase?
The FCC has approved a new unannounced Nokia clamshell phone known as the 6750 Mural. Details are very scarce yet; it will support 3G on the 850 and 1900MHz bands (obviously AT&T), will not be S60-based, and will have a dedicated Telenav button which means that GPS support is present in the mix.