Exactly the tool i searched for, as i had to import hundreds of users from a excel file. just exported the excel file as csv file and then imported it successfully with userport.

However, i still have the same problem like the poster "hperangelo". I am logged in as superadmin but all users are still imported as "authors" not as "registred users" as i set in the options.

checked it twice, but couldn't figured out this problem.