I don't want to compete with slashdot, but there were two announcement made yesterday that impact the Open-source Security tool market.

Tenable announced yesterday that Nessus 3 will be closed-source: http://news.com.com/Nessus+security+tool+closes+its+source/2100-7344_3-5890093.html?tag=nefd.hed

Checkpoint announced the purchase of Sourcefire, but promises to keep Snort open-source: http://www.checkpoint.com/sourcefire/index.html

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kliston -AT- isc sans org