Xively Workaround Possible?

Hello,

I have a cellular shield to go with my Arduino board + sensor which should be able to send data onto Xively.

As the cellular shield won't be fully functional for a while I was wondering whether it would be possible to somehow send information from the Arduino IDE (as it does display readings in the Serial Monitor) to Xively using my computer as the middle man.
This might enable me to figure out some of the coding part before starting with the shield and see how Xively behaves.

Note: I hope this is roughly the right forum section.

Cheers.