Zimplit needs no database - it creates standard HTML pages. Templating consists of you creating your own HTML file. New pages start off as copies of existing pages. It is really very basic. No blog support, no gallery support.
Yep, it's crappy browser sniffing time again. Anyone who promotes the idea of feature detection instead of browser sniffing would be running around in little circles screaming and pulling their hair out right about now.
There are at least two WYSIWYG editors around that are much better - TinyMCE and FCKeditor. Why the Zimplit guys felt they had to reinvent the wheel and then make such a hash of it I don't know.
Apart from all that, what kills Zimplit for me is the dependency on the off-site JS and images. An international communications glitch would leave me unable to edit my site. Or the company could disappear.
Zimplit has too much going wrong now, and potentially far too much going wrong in the future. One to avoid, I think.