Convert from Database / Excel / CSV to YAML data fixtures?

I wrote my own Macro to solve this problem & shared it. You can specify the fields in your model, fill-out the data and the YAML is generated. The best part is that it supports Nested Data as well (based on NestedSet Doctrine Behaviour)

You can download the file from here: http://www.prasadgupte.com/go/converting-csvexcel-data-to-doctrine-yaml-fixtures/

Hope this helps!

A quick google search came up with this: http://code.activestate.com/recipes/546518-simple-conversion-of-excel-files-into-csv-and-yaml/

Requires Python though but that shouldn't be a problem. Looks quite promising and does exactly what you need (keeping in mind that CSV files can be opened with excel like a native excel file and saved as .xls)