Accellerometer and arduino lillypad and wearable projects
The resistors don't have to be on the accelerometer board. As long as you don't intend to make the connection many meters long it doesn't really matter, so they may be as well placed on or near the Lilypad.  

Be sure to run the Lilypad at 3.3 V as well. The Lilypad will only pull the lines low, and let the pull-up resistors set the high value, so there won't be 5V on the accelerator's inputs, but the 3.3 V may be too low for the Lilypad's inputs if you run it at 5 V. In most cases it won't be a problem, though. If you can, run the Lilypad at 3.3 V, otherwise have a look at this question to read more about it.