Mashable founder Pete Cashmore will say goodbye to his American friends tonight in San Francisco. The faux-blogging CEO caps off his six-month visa stay with a party, booze, food, and — as always — startup pitches. The Scottish whirlwind came to the U.S. and stayed long enough to snag a documentary, as well as gals left, right, and sometimes both sides. What's the secret? Perhaps it's his dapper outfit. We chronicle Pete's magical suit vest:February 23, 2008: FlashMash Meet NYC Februrary 25, 2008: The hardest working suit vest in the blog business Valleywag March 10, 2008: SXSW '08 March 11, 2008: The hardest working suit vest in the blog business Valleywag March 12, 2008: Rana Sobhany's Rock Band Party March 13, 2008: (Photo by Brian Solis/Bub.blicio.us) March 18, 2008: Tumblr/Rock Band party March 31, 2008: Mashable/Causecast drinkup April 5, 2008: The hardest working suit vest in the blog business Valleywag April 11, 2008: PopCrunch 2008 April 22, 2008: Web 2.0 Expo/Digg party June 7, 2008: (Photo by Brian Solis/Bub.blicio.us) June 18, 2008: (Photo by Brian Solis/bub.blicio.us) July 15, 2008: The hardest working suit vest in the blog business Valleywag July 18, 2008: LA Mashable Tour July 20, 2008; The hardest working suit vest in the blog business SummerMash LA August 21, 2008: Mashable Monthly September 20, 2008: Blog World Expo September 30, 2008: (Photo by Mark Heithoff/DETAILS) October Details magazine profile. (Top photo by Caroline McCarthy)