Just had a quick look at 8apps, well at the screencasts since it’s an invitation-only beta. Turning Web 2.0, mostly fun, applications into business tools looks interesting and, from my point of view, definitely has potential to ease and improve certain work flows.
The only concern that came to my mind was about the storage. Companies won’t be very happy if employees start working with sensible business information on company-external servers. (seen in the nonsmoking area)