There was some discussion at http://www.moneyscripts.net/forums/support/2010/09/22/export-reports. The profile_csv module works but provides no membership info.
I'm exploring creation of code and do see that you add memberships to the $user structure when called via user_load. I continue down this path really would like to see this as part of Moneyscripts. Short of this appearing in Moneyscripts, advice on possible helper functions (if any) in the code would be appreciated.
In our particular case we want to maintain postal addresses as part of our DB and extract these for current members to generate labels for old fashioned postal mails. Extracting a csv file would suit our purpose. I recognize that the issue of multiple memberships does complicate things a bit. Repeating the user for each membership would probably be OK.
The use case you are after is too specific to be added as a feature to Membership Suite, since it involves a custom profile field.
I think that the best way would be to expose the user's membership levels to the Profile CSV module, so that you can export it using that module. What do you think about that?
Sincerely,
Leighton Whiting