two files containing the translation of ubercart alpha8:
it-ubercart-alpha8.zip -> contains one big .po file
it-ubercart-alpha8-po-files.zip -> contains all the .po modules files into directories
you can download the first or the second file, unpack it and import into you drupal site.
see also this post: http://www.ubercart.org/forum/internationalization/2107/translation_stri...