Two ways:

1)Export the list choose fields: email address, choose type: spreadsheet (excel).

Open the excel doc and copy the emaill addresses, then paste into the bcc field of your email editor.

2) Use the customer notice function to create the email, the go to output in lmm choose customer notices, select the notice you have created then select the email option.

I hear there to be a sql version of Mom forthcoming, apparantly designed to aid network speed for large operations: surely enabling Dyadacomp to avoid some of the file locking problems that must be a nightmare for their development. With the possibilty of enabling more flexibilty and perhaps even more realtime processes for all users.
Good strategy.