Agile Process Software or Index Cards/Stickies?

There is some discussion going on here about whether software tools work well for managing Agile processes or whether going manually with index cards and sticky notes works best.  Is your team practicing Agile?  If so, what works best for you?

Jonathan Cogley is the CEO of Thycotic Software, an agile software services and product development company based in Washington DC.  Secret Server is our flagship enterprise password management product.