Arduino + sensors + zigbee + 3G

Hello, everyone

I am starting new project using sensors.
What I want to prototype is to prepare sensor nodes that send sensor data to the gateway with zigbee
and the gateway that receive data with zigbee, then send all received data to the server with 3G.

I am thinking about using arduinos + sensors + 3G shield + zigbee shield.
Does anyone know if we can connect one arduino board with both zigbee and 3g shield?

The reason I am thinking of using arduino is just because I can do fast prototyping, but
not 100% sure about the feasibility.
It would also be great If anyone knows any other way to fast-prototyping to develop the system above.

Thanks in advance!

Does anyone know if we can connect one arduino board with both zigbee and 3g shield?

With the right XBee shield and the right 3G shield, yes. With the wrong ones, no. Which ones are you thinking of?

You mean

ZIGBEE PACK (802.15.4 VERSION) - ARDUINO PACK
http://www.cooking-hacks.com/index.php/arduino-zigbee-pack-802-15-4-version.html

plus

GPRS/GSM QUADBAND MODULE FOR ARDUINO (SIM900)
http://www.cooking-hacks.com/index.php/gprs-quadband-module-sim900-for-arduino.html

or

3G/GPRS SHIELD FOR ARDUINO (3G + GPS)
http://www.cooking-hacks.com/index.php/3g-gprs-shield-for-arduino-3g-gps.html