A new beta release of the Nagios 3 code has just made it out. 3.0b2 fixes a few bugs present in beta 1 and includes some more improvements to the new host check logic. Check out the Changelog and download it now. NDOUtils 1.4b5 was also released to stay current with internal changes made in Nagios 3.0b2, so get that as well if you need it.
Nagios Update: XI 5.6.6
Nagios XI update 5.6.6 is now released! This update resolves a number of minor bugs and one security vulnerability fix. This version also includes improvements