Do you have some smb shares mounted in fstab? Otherwise it could be this bug:
https://launchpad.net/distros/ubuntu/+source/hal/+bug/44874 -- HAL time on boot too long https://launchpad.net/bugs/46931 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
