About 6 months ago, I posted an entry on how integration was crucial to success of smaller web 2.0 applications.
Today Yahoo released Yahoo Pipes, which sounds like an implementation of the same idea. A platform for creating mashups. The web is evolving in interesting ways, and whether this particular service succeeds or not, we will see more mashups between smaller web 2.0 services.
This definitely is a great start and I am sure we see more in this space.