What are the saas sites that you've seen with GREAT homepages which really get across what the company does, and why you should sign-on?

The ones I've looked at are

http://basecamphq.com

http://google.com/apps

http://zoho.com

http://www.olark.com/portal/

http://posterous.com/

http://www.weebly.com/

https://www.wepay.com/

https://www.cloudkick.com/