My favorite theme by far, with one or two very minor issues.
1) Using GPE calendar the light font is almost invisible against the yellow calendar background. This is of course because the LCARS theme uses light text on a black background. Using the orange 'PADD' variation resolves this, but I don't think it looks as nice as 'Modern'.
2) The sounds are permanent. That is, you have to completely uninstall the theme in order to use the default ones properly. Again,I suspect this is a limitation of OS2008 rather than the LCARS theme. Note that the theme itself is easily removed.
Overall, highly recommended.
Daniel: The sounds can be easily removed while keeping the themes, since they have their own package. Same goes for the replacement icons/startup graphics. First uninstall lcars-complete (a meta-package which depends on all other LCARS packages, but installs no files of its own), and then you can remove the sounds and/or extras packages while keeping the themes. Reboot after removing lcars-sounds, and Nokia's sounds will return. We made separate packages for the various parts so people can pick and choose which parts to keep.
p.s. I wouldn't have rated my own software, but this comment system requires a rating, and if I select nothing it rates 0/5 stars. Very nice, Nokia ;)