On behalf of the IronPython team, I'm happy to announce the first beta release of IronPython 2.7.5. This release includes everything from IronPython 2.7.4 and earlier. Like all IronPython 2.7-series releases, .NET 4 is required to install it. Installing this release will replace any existing IronPython 2.7-series installation. Assemblies for embedding are provided for .NET 3.5, .NET 4, .NET 4.5, and Silverlight 5.
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IronPython 2.7.5 Beta 1 is also available for embedding via NuGet. The main package is IronPython, and the standard library is in IronPython.StdLib.