So you are running Ubuntu 9.10 and you would like to have the Mac-like launchbar?
Well, look no further than Cairo-Dock: http://www.cairo-dock.org/ww_page.php [6]
Links:
[1] http://linux.philosweb.com/drupal/category/it/innovation
[2] http://linux.philosweb.com/drupal/category/it/software/software/os/linux
[3] http://linux.philosweb.com/drupal/category/it/software
[4] http://linux.philosweb.com/drupal/category/it/tweaks
[5] http://linux.philosweb.com/drupal/category/it/visualization
[6] http://www.cairo-dock.org/ww_page.php