Whois lookup shows it expired today. Looks like the registrar is enom. They usually hold the domain name for a while before they release it out to the public again.
Domain Name: MESATACTICAL.COM
Registrar: ENOM, INC.
Whois Server: whois.enom.com
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Name Server: DNS1.NAME-SERVICES.COM
Name Server: DNS2.NAME-SERVICES.COM
Name Server: DNS3.NAME-SERVICES.COM
Name Server: DNS4.NAME-SERVICES.COM
Name Server: DNS5.NAME-SERVICES.COM
Status: clientTransferProhibited
Updated Date: 30-oct-2010
Creation Date: 29-oct-2003
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Expiration date: 30 Oct 2010 00:26:00