SIC Software is offering a free FTP Client for all Nokia S60 3rd Edition devices. This client is offering a a powerfull filemanager besides many FTP functionallity. To get the client you must send an SMS with the content "sic ftp" to the short-number 86000 (only available in germany at the moment!). Please use their Wap-Push form for sending in all other countries, link below : 

http://www.sic-software.com/modules.php?name=captcha