For connecting to a source I'd suggest that the Standard Speaker/Amp package then has some options that could be offered such as:
1) DLAN Wireless Device
2) ...shudder....ipod dock

...just please don't build it into the package as these are the bits that become redundant well before a good speaker and it's amp....

HT:M80,VP150,QS8,EP500 Outside:4xM3 Office:AudioBytes, Rumpus: M60,VP150,M22 Portable:2 x Airs