Yesterday, this was the footnote to a MacBook page.  It has since been changed. 

http://store.apple.com/us/browse/home/shop_mac/family/imac?aid=AIC-WWW-NAUS-K2-BUYNOW-MACBOOK-INDEX&cp=BUYNOW-MACBOOK-INDEX

An iPhone home dock with a cordless phone that pairs via Bluetooth when docked.  The dock/phone should still be able to pair with your cell even when not docked.  While I'm making up things, it should also charge and and have data connectivity.