I will list here hosting providers that use ehcp as its control panel.
If you also use ehcp on your server, let me know and I will list you here.
In fact, there are hundreds of people that use it, but not all of them are hosting provider, they do hosting for themselves or for their company.. I started this list newly and will grow in time, i think.
Of course we also do some hosting... using ehcp...

here is list:
http://www.forefront-hosting.co.uk/
http://vpsblaze.com/cheap-vps-plans/
http://veb.ro
http://it.hellospace.net/
http://www.simplerack.net
http://hostingforoz.com/
airkayu
http://www.touchvps.eu/
http://www.boxvps.com
http://razaodigital.net/
http://www.webspacefreehosting.com/

(send us msg to be listed here)