Firewall Wizards: Edge appliance (firewall) that filters/monitors/records instant messenger?

[Victor Williams <bwilliam13 () windstream net>]

I am looking at different technologies to address the constant and 
ever-changing instant messenger issue.  At this point, I'm looking at 
two options really...block everything at the firewall except incoming 
VPN connections, and use a proxy server for any required outgoing 
internet access, and use an internal IM/conferencing service like Office 
Communications Server 2007 that can hook to public IM networks if needed...
Or...

Something like the Fortinet firewalls that can 
allow/deny/control/monitor IM/URL/virus/spam/IDS/IPS/etc traffic at the 
perimeter.  We have Secure Computing sidewinders and Cisco ASA's 
in-house already...they can handle everything except the IM traffic.
Management has stated that IM of some kind is required for certain 
employees who are separated by a continent to save on long-distance 
phone usage until VoIP can be fully realized/utilized.
Overall question, does anyone know of any other options that would allow 
me to manage this traffic and be able to provide to management 
transcripts of what is typed, and to whom?
Yeah, I know I could use Ethereal and some other freely available 
things.  Issue is, I want fire and forget, with the ability to let the 
managers to receive/view the reports without my interaction.  Likewise, 
I want someone else (a vendor) to manage the ever-changing issue of IM 
traffic signatures and whatnot, which I would still have to 
handle/decipher going the Ethereal route.
Thanks for your time.

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