Positioning the semantic desktop is not easy. It's a big topic with all kinds of potential but it takes a while to explain all the benefits. Making it more challenging yet, we still don't know what all the benefits will end up being, either.
This leads to understandable skepticism often being voiced in reader comments when the semantic desktop comes up due to this. By providing updated information on resource usage, offering "poster boy" examples of Nepomuk in action and showing how we will be using Nepomuk to do things we already do now (only better) we can turn this around.
There are fun and useful things you can do with Nepomuk today.
Spread awareness of how Nepomuk is actually useful to people in their day-to-day lives, justifying it's existence on their computers.
Use a set of "poster boy" features for the semantic desktop as examples whenever discussing Nepomuk and repeat them in every interview / article we do where the semantic desktop comes up. We should have three good examples of new such features for each major KDE release.
Nepomuk bring not only new features, it is also helping improve things we already use and rely on all the time as a "behind the scenes" technology. Often you won't even know you're using it, other than it making the software experience better.
The goal is to provide counterpoints to "I don't want to tag all my stuff manually" and "I don't care for this new fancy stuff, I am happy with the current functionality I have as it is".
The foundations of Nepomuk are maturing.
As a new technology, Nepomuk has been shipped in various broken states by some of our downstreams and has historically used technologies that are new and even immature. This is improving, and we need to spread the word so that Nepomuk's reputation can be rid of these "early days" hiccups.