Nightmare of segmenting Techcelerate, CapsuleCRM and Mailchimp Databases whilst keeping them cleaned and in sync

How do you segment multiple databases, keep them clean and in sync? If you know an easy way, please do let me know. Techcelerate maintains 3 vital databases among many for operational management. These being: 1. Techelerate.org (Drupal 5) with 1893 community profiles used predominantly for event registration 2. Mailchimp for weekly newsletter with 1844 […]