This week’s Ask a VC was with Bijan Sabet of Spark Capital, a standout in the younger generation of VCs whether you are looking at his portfolio (Twitter, Tumbr, Boxee, SendMe) or talking to entrepreneurs who work with him. I asked Sabet about how fundraising went for Spark Capital, which just raised its third fund, and how much that early investment in Twitter helped the process. We also talk about a running theme on this show– how startups outside the US can get US VC attention.