I've been using Zemanta for the last few blog entries, by way of making it easier to link to related wikipedia articles, and finding related news. But now I've come across something called Apture which allows me to do something similar, but connecting to a larger selection of links, using multi-media formats which pop up directly on the screen.
For example if I mention a song called No Alarms and No Surprises by Radiohead, I can easily set up a few references to YouTube and similar. A reference to Hu Jintao might yield different results on different media formats.
Let me know if it gets too irritating.