Last week I uploaded version 0.4 of the IronPython Extensions for Visual Studio to BitBucket and the Visual Studio Gallery. This release includes a couple of new features and some minor performance improvements to the old features.
What's NewSquiggles! The editor will now underline inconsistent tabs (mixing tabs and spaces) and syntax errors. It doesn't currently display a tooltip explaining what the underline is for, or offer any automatic fixes, but those should be coming soon.
Also new is an interactive console for use in Visual Studio. The advantage this has over a normal IronPython console is that it will syntax-highlight the console history. Eventually I'd like to have it pull the colour scheme from the editor.