on the banking video: go to feefighters.com - save yourself a ton of money by making payment processors compete for your business. Almost all of them integrate with authorize.net which does what ryan was talking about with recurring subscriptions and storing cc's on their servers (so you don't have to be PCI compliant).
on the accounting video: ryan is wrong about quickbooks only working on one machine. It is designed to live on a fileshare and have multiple clients connecting to it on your network. They also have an online version, however almost ALL US accountants will know what to do with a quickbooks file.