Filezilla's released a new version, 3.0, today. Filezilla is a quality cross platform FTP client. I've been using the previous version occasionally for a year or two, so I will probably check out the 3.0 version pretty soon. If you're using a shareware or other ftp client, I recommend trying filezilla to see whether it will meet your needs. It's better than using command line ftp or a simple web-browser interface.

If you're not sure what FTP is, then don't worry about it.