Also, by no means should anyone listen to me, but if your PhD environment (e.g. Stanford or in a top tech program), personally I would at least attend a semester -- at the very least make some connections.
And if you're like me and being paid to go to graduate school it's more tempting to stick around (especially if other people's research depends on you or you have a general feeling that you're letting down people, e.g. profs that you got you where you are now). There were times I wavered because of this but at some point I told/convinced myself that 10 years from now these people will understand.
People not in the situation tend to be very gung-ho and tell you things like ... do what your heart feels! seize the day! blah blah blah. I've heard it all.
I'm in the middle of attempting to do a PhD and a startup at the same time but it's damn hard. I basically don't sleep. Meeting with my co-founder has become sparse as my research demands increase and it's really affecting our progress -- especially since I'm the coder. In short, if I want this to succeed, I have to leave, which basically I've decided to do at the end of this semester.
obviously many people either don't care or don't even realize (and thus don't care) the app takes up more memory. sure, there are opportunity costs to everything. people who use meebo or like-minded apps reap more benefits from the convenience than from the memory tradeoff. until someone comes up with something better, I don't see what the complaint is.
