Open Source E-Business Solutions?

Thor Sigvaldason asks: "I work for one of the largest companies in the world (PwC). Some of the powers that be have recently decided that we need to do the E-Business thing in a big way. My mandate is to determine who can provide this. Yeah, yeah, I know; php4 compiled as an Apache module will do everything you ever need. I've been running Linux since the pre-1.0 days, and still can't figure out why people would boot to anything else. That's not my point. Most big clients need a 1-800 number to settle their frazzled nerves. There are millions of dollars being spewed into e-commerce as we speak. But where is the OpenSource equivalent of Broadvision, NetPerceptions or someone like them? The market is really, really ready. Do you need help with an IPO? Have I missed the relevant URL's?" Sounds like a void some brave entrepreneurs might want to fill.