Re: How to make TIKIWIKI look more like a website than a WIKI
In the case of trionis.com, the site is using tikineat.css, which is the old default theme, and has the side columns turned off. The page I looked at is using the SPLIT plugin to get the appearance of two columns. The logo, etc. is displayed within div#siteheader. I didn't check if Look & Feel custom code, or a customized tiki-site_header.tpl template file is used. In short, it's pretty standard Tiki files, just with some imagination applied.
Believe it or not, www.calypsoushaka.co.za uses (at least what started out as) the Twist theme (demo of unmodified Twist theme). It's closer to a standard Tiki layout than the trionis.com site, but still has some nice customizations.
So, yes, these are done largely with CSS changes, and imaginatively using what Tiki provides (and also turning off - or limiting to admins/editors - some things that are geared more for a wiki/collaborative site than a "presentation" kind of site.
-- Gary