No Labs Love for Google Apps. This domain’s e-mail account is hosted by Google Apps — and I use Mail.app to read my e-mail — so the fact that GApps seems to be branched off from all the cool Gmail features is an annoyance for me, too. Good to hear that someone’s trying to fix it.
You can add Spotlight queries to the Quicksilver catalog. Add “date:today” to the catalog and your QS searches will include any files on your drive that have been created or modified today.