Jquery – Downloading jQuery UI CSS from Google’s CDN

cdncssgoogle-ajax-librariesjqueryjquery-ui

I am planning on using Google to download the jQuery lib for both UI and Core. My question is, do they allow me to download the CSS for it or should I have to host it myself?

Also if I use Google to load how should I load other plugins? Can I compress all plugins together or should it be its own separate file?