I have urged a few clients to use http://www.webftp.co.uk/ which is not as nice, but at least they will be able to use it to get around their work firewalls. If you are worried about security you can also install it on your sever and protect it with a password.

I too am on reg365 and have had terrible service from them as half the time some feature doesn’t work ,mail,webshell,stats,etc. However i stayed with them because of convenience and the webshell product. Ftp is a time consuming and terrible way of making changes. But now thats gone i think ppl will leave in droves.