1. Delrin drip-tip (preferences vary, but I hate the steel drip-tip on the Nano)
2. Slightly smaller/lighter than the subbox (I'm guessing that the battery would add the most weight here)
3. You can bring out the colourful you (I'll still go black though... I'm guessing those will be in highest demand - then again, once I decide to invest in a pink tu-tu I know which mod will go with it)
Some negatives -
1. No word from local vendors yet
2. Colour choices very female, and I'm thinking most females will find it too much as well