Hi, this is exactly what I´m expecting from the raspberry. Actually we are using an fpga to control the data in/out from our weather station (you can see it here http://tinyurl.com/7qmgop4
) and acts like a web server. Raspberry also can provide an allsky webcam service and much more at a very low cost.
All components for our weather station costs around 120€, it provides sky quality meter, rain meter and sensor, wind speed and direction, cloud sensor based in peltier and you have two relays to do whatever you want (we use it to open and close the observatory roof), all components are homemade reducing costs to an acceptable level.
I hope to see this going forward.
Edit: BTW we use a gprs modem, at very very low speed because the coverage... but working anyway.