Yes. To import your existing companies and projects from Basecamp Classic to your Pulse account, go to the Companies page. On the right of the page, choose Import Companies, then enter your Basecamp or High Rise information to import your companies and projects.
What if I use OpenID for my Basecamp Classic account and don’t have a username and password?
If you use OpenID, Basecamp provides a special username and password that you can use with third party applications like Pulse. To retrieve this username and password, sign in to Basecamp and click on the “My Info” link at the top right corner of the page. From there, click on “Reveal my special username/password” next to your login information.