I just read that the Kubuntu team wants to include Kat in the dapper release (scheduled for April 2006). Kat is (to be) the KDE equivalent of Google's desktop search bar.
This is great news for us chem-bla-icians, as Kat has support for full text searching of chemistry files! Let's see if I can get the Kubuntu team to package up kfile_chemical too, which will extend Kat (and KDE in general), with extraction of meta data from chemical documents.
Update: Dapper will be released next year, not in 2007.