I have Constant Contact Majix 1.0 installed on my website and it is working great. We've had over 100 people add their name to our mailing list in the last 2 months. However, when looking at our contact list in CC, we have email addresses but can't tie this back to a name (first, last). CC has many fields in its contact list but we must be able to tie to a name so we can personalize Newsletters that we send out. I know 1.0.3 adds some new params but can't find out which ones.

This is a great idea and we have already looked into how to add this feature, however, due to the simplicity of how the form communicates with Constant Contact, this is not possible. This module would need to use Constant Contact's API in order to send more information than just the email address.
I would suggest looking at our Community Builder Plugin (Constant Contact Integration) for more of the features you are looking for.