One of the coolest things about Dreamhost is their use of the web-based FTP client net2ftp.  I've always felt that FTP is one of the most outdated ways of transferring files.  It's quirky, unreliable, and extremely insecure.  But up until now, it's been the only way to get files to my website.  I've tried many different FTP clients (WS_FTP, SmartFTP, FileZilla, etc.) and had successes as well as problems with them all.  Net2ftp is a web based client, which means you don't have to download any software.  The source files are download-able, but they're stored on your server and accessed from there.  The interface is easy to use and has useful features like keyboard shortcuts, java-based uploading (if desired), and zip decompression.  Plus, it uses encrypted passwords and a secure connection.  All in all, it's a great little program that eliminates the need for a locally-installed FTP client.