Apt rental in Berlin?

Check the listings for "Berlin Habitat", I think they have a unit that will work. Staying there in July, and great reviews on T.A.
They are in the Mitte.

Thanks--unfortunately, there don't seem to be any 2 bed/2 bath apts available for the dates we'll be visiting.

Rick's Germany book suggests http://www.circus-berlin.de/apartments/ (3-night minimum stay).

I also rented through Berlin Habitat and was very pleased with them. You didn't mention the composition of your party. A number of the flats are in the same building if two flats would work for your party.

http://berlinhabitat.com