I have experience with iMAN, we run this across a Global Network but not all iMAN Databases are linked due to export controls on some of our sensitive data... goes with the territory...
within our own site the software is managing all Unigraphics generated data, both Design and Manufacturing programs, we also manage an extensive WORD dataset for processes, assembly and test, specification and quality documentation.
In-house generated software code then provides the configuration controls necessary to publish this data to the coporate Intranet site for MASS data viewing, using helper plugins to view the Models (VRML) and Drawings (HPGL) and for the WORD releases (PDF).
All works well when you have well trained users. some get careless with data entries which can sometimes be difficult to correct.
Do not underestimate the resource needed to implement PDM software from any supplier, which you won't I know, but as important consider the ongoing maintenance aspects associated with keeping the Database in good shape, working and planning the upgrades, sorting the daily issues.
There are many other apsects of iMAN we do not currently use (Workflow) but for us we have it plugged in and it works well, if not without some faults.
chip in if you wish to ask for any particular experiences, this stuff works most of the time and having data under control is a pre-requisite.
Gary
CAx Manager / Lead Design Engineer
Moog Controls