For those that are interested in the personality chips and what they do...I finally got one (well, okay, all six...but that's a different story

) and had a chance to play with it in the parks a few weeks ago...
There are
six different personality chips that are compatible with both the R2 and BB-8 units. Resistance chips are orange or blue, First Order chips are red or black, and Smuggler ships are purple or grey. You can tell which type of chip is based on the symbol on the back of the package. Once placed in your droid, the chip changes the sounds the droid makes. I don't speak droid well enough to know if they're saying anything different (

), but the chips to change the pattern of beeps and the tone of the beeps. So, if you bought all six chips, you could listen to your droid beep in six different sets of tones (one at a time because the droid can only have one chip in at a time).
The other, and potentially more fun, effect of having a personality chip in your droid is the ability to interact with other droids. Only the droid with the chip will interact, but it will respond to droids without a chip. I was had the chip in my droid and was standing by the Haunted Mansion entrance (so no longer in SW:GE) and suddenly he started beeping. I was confused until I noticed that a group that had just sat down on the bench next to me also had a droid. I asked and none of their droids had a chip. It happened again when I was over at the Stage Door Cafe and on Main Street, so it seems like a droid with a chip will beep to acknowledge another nearby droid (seems like it has to be pretty close - I'm guessing maybe 5 feet or so at most).