If you're looking for a serial monitor application for Android that lets your tablet (or phone) talk to an Arduino, check out Slick USB 2 Serial. It can mimic the Arduino IDE's serial monitor, which is helpful for debugging projects that aren't on the benchtop!
Here is it working on my Acer A500 with Honeylicious 3.2.1. The output you see is from my Arduino Duemilanove running the serial ASCII table example sketch. I have also confirmed that this application works on Thor's ICS build v96 for the Acer A500.
Happy serial monitoring!