23 Atlanta, Georgia
13 Chicago, Illinois
45 Columbus, Ohio
38 Copenhagen, Denmark
20 Dallas, Texas
29 Denver, Colorado
47 Falkenberg, Sweden
27 Frankfurt, Germany
36 Haarlem, Netherlands
61 Khimki, Russia
60 Kiev, Ukraine
24 London, England
21 Los Angeles, California
26 Montreal, Canada
54 Moscow, Russia
31 New York, New York
51 Orlando, Florida
43 Paris, France
35 Prior Velho, Portugal
28 San Jose, California
22 Seattle, Washington
32 Toronto, Ontario
44 Washington, DC
These locations are just for Mumble & Ventrilo.
As far as downtime, there is hardly any. Might be up to 5 minutes (for server updates) within 2 months.
Also, if you are looking for gameservers we sell them. Just started selling MW3.