The Mitchel London shop at the corner of 40th and 9th has been bought out and turned into the Urban Cafe, a real lunch/dinner/ afternoon snack/drink type spot.
We've been 3-4 times, in many ways it's similar to what ML was -- the burger is as awesome as it was under ML's reign (and you can now get it with blue cheese!!), fried chicken is excellent and the salmon was a nice fresh piece cooked to order for $13. They have a chef who, the owner told me, used to work up in Harlem, but I'm not sure where exactly.
They've added a bar and made the inside much more spacious than the way ML had it, although the looks (bland and too clean cut) and the name need work, if you ask me.
If you're in the Port Authority area and looking for inexpensive, solid renditions of "American" food, and a drink, it's a fine choice. I'd also check it out for any sort of burger craving, I think it's burgers rock.
It's less atmospheric and has a smaller menu and wine list than Market Cafe, which I take to be its prime comeptitor, but I think UC beats MC on sheer food quality. Aside from MC's skirt steak, which is outrageously good and a good value, I find MC to be quite inconsistent. UC's got a much surer heand when it comes to the qquality of the raw ingredients and the cooking, seems to me.