Astaro:

Ibm x336 3 gigs ram dual p-4 xeon 2.0 w/ht 3 gigs ram 25users 2x broadcom, 2x intel 16M/4M cable connection
Features used: Web security http dual scan(30 meg limit), content filtering local database, web application security w 10 rules Mail Security a/v dual scan + anti-spam, WAF protecting Zimbra server , ftp proxy for internal only, ips limited to two cpus, Openvpn access for 4 users.

hyper-v host 4 x 2.4 ghz 4 vcpu 4 gigs ram 1 x broadcom 1x intel dual gig-e 16M/4M cable 5 users
Features Used: Web Security http dual scan(30 meg limit), content filtering local database, ips limited to two cpus, Openvpn access for 4 users.

atom n330 2 gig ram 1x realtek 2x intel 3M/768k 10 users
Features Used: http dual scan(30 meg limit), content filtering local database, web application security w 10 rules, ftp proxy for internal only, ips , Openvpn access for 2 users.

Dell SC420 p-4 celey 2.53 ghz 2 gigs ram dual intel 10/100 1x broadcom gigabit 80 gig hdd.  3M\768k 5 users.
Features Used: http dual scan(30 megs limit), content filtering local database, web application security with 2 rules, ftp proxy, ips.

Untangle:

AMD phenom 9300 4 gigs ram 10 users full lite package 20/5 cable

p-4 2.8 ghz no h/t, 1 gig ram,  3 nics, 6 users, full lite suite 20/5 Cable

For more details about usage patterns please contact me.