I am currently testing FireFTP to upgrade this little blog to WordPress2.
FireFTP is a nice extension to Firefox and has the basic ftp stuff: upload, download, and chmodding. The FTP opens in its own tab and has an astoundingly clean cut interface. I would recommend this extension to anyone in need of basic FTP features, but with little interrest in installing ‘ free’ or paid-for programmes.

Update:
Wordpress2 now installed – no fuzz, no stress. Only bump on the way was to learn to always backup before upgrading (or atleast omit to delete config-file…)