We have released version 1.3 of MindFusion.Spreadsheet for WPF. The new version includes:

Auto-filtering
Worksheets now support auto-filtering. To enable it, call the AutoFilter method of the CellRange class. To specify auto-filtering criteria for individual columns, use the AutoFilter overload. These criteria can also be specified interactively, through the drop-down buttons inside the headers of each column in the target range.

Miscellaneous
The ExcelImporter class now exposes a ReadConditionalFormats property, which can be used to prevent importing of conditional formats.

The latest version can be downloaded here:
http://mindfusion.eu/WpfSpreadsheet.zip

The component's assemblies are also available as Nuget package. To install it, run the following command in the Package Manager Console:
PM> Install-Package MindFusion.Spreadsheet.Wpf

Enjoy!