I've been using a Macbook Air 2nd gen 1.86Ghz/2G/128GB SSD for 2+ years as main station along with a 23", then 27" screen. It has not slowed down my productivity at all but instead increased it! Being so portable let's you work anywhere, I carry it everywhere, even on the eliptical walker it's great to catch up on twitter feed or watch a video!
With a higher rez screen, greater battery, more memory & larger permanent storage, I can only imagine the new ones are even more suited to become your main development machine (and you won't be going back once you tasted it ;)
Being an introvert is not directly related to poor social skills. It means that you get your energy from within, from being alone with yourself. Others drain that energy from you and that's why in settings where a lot of people are around, you feel uncomfortable, and wear out very quickly. Extraverted people get energized from being around people, which is completely the opposite.
You can succeed in life being either way. Actually, a recent study showed that now close to 50% of the Fortune 2000's CEOs did acknowledge to be introverted! All that it means, is really that you need to respect your needs, and keep yourself on a schedule where you have enough alone time to charge up, and then pick the place & time to unleash all that energy to others.
You are so lucky that being in 2010, you can now also interact and network with many people the electronic way ;) This is not a replacement for the real thing, but it can definitely help you improve your social skills in an environment that does not drain your energy, nor makes you feel uncomfortable.
The bottom line? Embrace yourself, be who you are and nurture your passions & what excites you. I personally know many very successful introverts, so don't let this be your excuse for not reaching out for the stars!
With a higher rez screen, greater battery, more memory & larger permanent storage, I can only imagine the new ones are even more suited to become your main development machine (and you won't be going back once you tasted it ;)