Thanks for signing up Sailnet! Happy to answer questions.
In regards to the fonts, you can have some limited control over font selection from our "Skinning" panel on our backend (
http://www.envolve.com/admin). Font size is currently not an option, though we are intending to make this much more flexible in the future.
You can definitely disallow the creation of new chats by general members. This option, and many other options, are available from the Options tab on our backend (
http://www.envolve.com/admin)
Hope that helps!