Given that communication touch points may not be as frequent it is very important to make sure that individual team members are getting what they need out of individual calls with you.
Consider keeping in touch and communication with the entire group not only via phone, but email, shared message boards, and even a shared newsletter. On the individual level consider that each team members may have different preferences for being communicated with.
As you consider the topic of keeping in touch with your team, what does it mean?