Originally Posted by greatbasin

Postcards.
For photos, you could mail them a roll of film and have them develop it.
If you're staying at a hotel, they could send mail to it ahead of your arrival.
For conversations in real-time, try amateur radio. It would work best to have a pre-arranged time for contact. At their house, they could use any transceiver. On the bicycle, it would be most practical to carry a QRP rig. For the most fun, use CW.