I am very interested in a site build for DirectAdmin. Also I agree with jlasman comments. What is important for me if I am going to offer a website builder to my customers, is this:
The application MUST work without problems in ALL major browsers, like IE8, IE9, Opera, Firefox, Chrome and Safari.
The end result with the webpages that was created by the site builder, must also display correct without problems in ALL major browsers, like IE8, IE9, Opera, Firefox, Chrome and Safari.
The end result with the webpages that was created by the site builder, should be identified by a HTML 5 docktype, and it should be valid HTML according to HTML documentation/recommendation from
w3c.org - it is however fine if there is some errors when checking the pages in W3C HTML validator (
http://validator.w3.org/ ), but please try to keep the errors in HTML output to a minimum. The same goes for CSS, wich should be with a minimum of errors when checking the webpages in W3C CSS validator (
http://jigsaw.w3.org/css-validator/ )
The end result with the webpages visual design must not be formatted using HTML tables, HTML tables must only be used for presenting actual tabular data, not for layout of the visual design - for this it must use proper CSS.
Please try to not use flash for the end result webpages that is created.
The pricing must not be for each domain, but there must be a license for each server/ip. Also try to make the license check in such a way that it will continue to work if you stop providing the product in the future. Also it must be hosted on my on servers, and not on external servers out of my control.
I feel like I have forgot many things, but I think these are the most important for me. Good luck, and thanks!