SanDisk adds Wi-Fi to an MP3 player as Microsoft did with the Zune. Maybe Apple does it tomorrow to an iPod at the MacWorld 2007? It would not surprise me.

Update:
Order on Amazon.com now

With the Wi-Fi connection you can access or purchase music.
The Sansa Connect features 2.2 inch screen, photo player, internal speaker, community connections via Internet and USB 2.0.

SanDisk teamed with ZING to develop the product. Sirius also partnered with Zing on their wi-fi music players a while ago. The SanDisk Sansa Connect will be available in late March. The 4GB Sansa Connect will have an MSRP of $249.99.
More details in this SanDisk press-release.