Communicate with Sensor wirelessly

Using Arduino Sensors
1

I managed to get my MMA7455 Accelerometer working following the instructions here and using the library:
Google Code Archive - Long-term storage for Google Code Project Hosting. .

So far, I have the arduino sending 3 chars and a C++ program (w/ boost::asio) reading them nicely from /dev/ttyUSB0 .

Now, I want it to do this wirelessly.
The sensor board here uses I2C.

Can anyone give me some general idea and point me to some resources about how I can eliminate the wires between the arduino and the sensor ?

(My knowledge is somewhat limited in this area, so apologies if this question seems naive.)

2

What is it you're trying to do?
You could put a smaller Arduino with wireless capabilities at the sensor, but the sensor still needs to be wired to something capable of reading it.

3

I have the sensor on a ~2cm side square board.

I'll have to make the protype somehow wearable on a finger, sort of like a ring.
So, whatever does the wireless communication must not be much larger than that.
The range need not be very much.
A few metres is more than enough.

This contraption would ultimately be an input device by which an user can control a computer.
Since my main goal is to develop the algorithms in software, I'd like to avoid difficult or expensive hardware.

Another little arduino seems to be a nice idea.
Any recommendations that cost below...say...Arduino Uno ?

What about some sort of infra-red wizardry?
Can I keep my code intact and build a transparent system that emulates the wires with that?

4

As far as I'm aware, there are no I2C wireless adapters - the bus is intended for connecting devices on a single PCB, like a mobile phone engine.
You could maybe make an adapter using a Tiny, reading the accelerometer and retransmitting the data via IRDA, but you've still got to power it.