Superb (formerly known as Grubwithus) is a location-based app that enables you to collect and share unique places with your friends, so you can actually go out and experience them. The company is funded by GRP Partners, Y Combinator, Andreessen Horowitz, NEA, First Round, SV Angel, Ashton Kutcher, Vivi Nevo, Yuri Milner, Maynard Webb, Matt Cutts, Elad Gil, Paul Buchheit, Alexis Ohanian and Start Fund.