I also think the BL needs to handle the management of permanent network/volume storage. The DL/UI will handle the temporary loading of networks/volumes into a workspace. Coordinated control of a network/volume by multiple UI's/DL's will be handled the following way: UI UI | | \|/ \|/ DL _____\ DL / | \|/ root DL | \|/ BL As per Jarl's suggestion. So, there really is only DL->DL authentication, correct? Jeff -- +----------------------------------+ | J.W. Bizzaro | | | | http://bioinformatics.org/~jeff/ | | | | BIOINFORMATICS.ORG | | The Open Lab | | | | http://bioinformatics.org/ | +----------------------------------+