I had this site reviewed by my Corporate IT Security team and there was a number of issues that they raised. While I like the concept and idea, I would be very uncomfortable utilizing this for our tool.
Many of the issues are surrounding thier "Terms of Service", such as -
a. - Any content shared to others may be accessible through the internet and may be crawled and indexed by search engines
b. - Gantter.com is still in development and terms may change once Gantter publishes this application as a production release.
d. - We also use personal information to help us develop, deliver, and improve our products, services, content, and advertising
e. - When you share your projects Gantter may collect the information you provide about those people such as name and email address
f. - We may collect, use, transfer, and disclose non-personal information for any purpose
g. - We may collect project schedule types, templates used, task data, task duration information
If you are willing to accept these risks, then a good tool.
Just some food for thought.
Keep Up with TechRepublic