It's only been a few weeks since v3.0.4 was released, but Jeff has shipped v3.0.5 of Gallio and MbUnit. Full details can be found on his blog but here's a quick list of additions.

• Assert.AreApproximatelyEqual added to MbUnit
• Test Factories (TestSuites) added to MbUnit
• Formatter for objects being tested to be displayed in MbUnit test reports
• AutoCAD Integration for Gallio
• Running x86 tests as 32-bit on x64
• Preview of VS2010 CTP Support for Gallio
• Many other bugfixes and updated tools support

The full list is on Jeff's blog. Download v3.0.5 here and read the documentation here.