Attention, rival Facebook-application developers: Slide has money in the bank, and your widget startup doesn't. Such was the unsubtle message of Slide's third anniversary, held last night at San Francisco's newly opened Contemporary Jewish Museum. It was the first tech-company party held at the sleekly modern spot, a block or so away from Second and Mission, San Francisco's new dotcom epicenter (Slide is based nearby, as are Yelp, Socializr, and others.) It was Slide's first big party since raising $50 million earlier this year. CEO Max Levchin has not let wealth go to his head — he was happily recounting how, when he first moved to Palo Alto, he had to fast-talk his way into an apartment lease from a paisan named Vinnie, since past startup failures had thoroughly wrecked his credit.