Market Cafe is one of my standbys for weekday lunch -- it's fairly quick, priced decently, and the salads are really, really good. It's a reverse salad bar concept -- the person behind the counter tosses your choice of lettuce, several toppings depending on the size you're ordering, and dressing (interesting ones, like ginger viniagrette). And you go on your merry way. Try the salad, it will not disappoint!
Sandwiches and grill items are also good, although I stick mostly to the salad.
This place usually gets packed at lunchtime although seats do turn over pretty quickly. The booths are prime real estate so if you can claim one, do it!
Salad!