I have also started playing wit arduino and I really like the idea of spreading some arduinos around my home to monitor motion, light, temperature, etc. Im currently waiting for an order of cheap 433mhz transceivers to get some networking between arduinos going.
I know there are zigbee/zwave modules for arduino available but they are quite expensive compared to the rest of the components required.
When the almond+ arrives It would be really cool to link the whole bunch together, so the almond logs the sensor data, gives a realtime/history overview, and acts on these conditions.
How to make this link i'm not sure yet, i was thinking of maybe using one arduino as receiver for the 433 network and using a lan link to get the data to the almond. But i have no clue yet on how everything gets to talk to and understand eachother. It will keep me occupied untill the almond finally arrives I guess