Exec is an errand running service that provides companies and individuals access to on-demand personal assistants (for delivery, furniture assembly, research, etc).  Exec now has a workforce of about 300 people and has served on the order of 10,000 customers since launching a year ago with YC Winter 2012.  TechCrunch’s Anthony Ha recently spoke with Exec founder Justin Kan about Exec’s expansion into San Diego, redesigned website, and new strategy of providing specific services to vertical markets.