And import from a few common spreadsheet formats (eg XLS, ODS, CSV) as well as an XML file. Must be able to import chart of accounts, debtor/creditor history & transactions, stock items & values, journal transactions, documents.
Obviously its just as important to be able to export to the same file formats as this affects my willingness to join in the first place, as well as to create a template for the structure spreadsheets to be imported.
Even if it was the journals and chart of accounts that would be a big improvement