Guacosoft.com has released XMLWizard, a new tool used to import data into Firebird databases. It supports XML, CSV and fixed-width textual files. XML import has some unique features like support for nested XML files and loading data from XML properties.
Beside importing, the tool can be used to compare the data from file against the database and cherry-pick the changes manually. More info, and a demo video can be found at XMLWizard website.