If you were quick to jump on the Google Desktop Search bandwagon like I was, you may be unaware of some cool new plugins that have surfaced since its release.
The OpenOffice.org plugin now supports OpenDocument, the new file format that will be introduced in OOo 2.0. If you regularly use audio formats other than MP3, such as AAC in iTunes or Ogg Vorbis, then there's an audio metadata plugin which lets you search the artist and title information of a wide variety of audio formats, including AAC, M4A, FLAC and OGG. You can even search filenames inside zip files.
I’m still waiting for an MSN Messenger plugin, that doesn’t require me to start using Trillian…
Also might be of interest : Integrate Google Desktop Search into Firefox
http://www.bol.ucla.edu/~rokers/gds.htm
Dev T