An interesting post here from Dion Hinchliffe on emerging technologies in enterprise 2.0. Its an interesting read with a clear articulation of the emergence of the social business concept as a driver for and product of enterprise 2.0. From a learning perspective, I believe activity streams in particular, will be critical in understanding how social media are used and the value of such tools for organisations.
For me, issues around Saas seem less interesting. Surely SaaS is a second order delivery channel issue and really of interest to IT/ CIO people but for everyone else, the only issue is whether this piece of software is helping me do my job/ perform better??