An interview on Hypergrid Business reveals the pricing of the new IBM virtual meeting solution based on OpenSim.  It's worth a read, and I'm fairly convinced of the usefulness of the product.  I haven't yet seen anything describing content integration though - how are the presentations, videos, task lists integrated with Notes (or heaven forbid another 2D knowledge and organisation tool)?  We think this is crucial, and we're working hard with Roobaab to bring about good integration with the 2D web. 

One minor point - IBM say they chose OpenSim in order to allow writing on a prim - we've done that in SecondLife to create a notecard board, one prim per notecard.  Video coming soon :-)