A panel discussion on 37signals' first ONCE product, the launch of Campfire ("pay for it once, install it, and run it on your own server"). Ian Landsman, Tyler Tringas, and Justin Jackson share what they expected to happen before the launch, what did happen, and what it means for indie hackers and bootstrappers who want to launch SaaS companies. Is this the end of SaaS? Links: Once landing page…