SEO ( Search Engine Optimization ) can be improved on a site by using a variety of different tags, not just div and span.
The header tag hierarchy is a prime example of SEO and tag choice. An <h1> tag is seen as more important than an <h2> tag.
A <strong> tag will bring greater importance to set of words that you may want as a keyword. Using <blockquote> and <q> on different quotations. <big> will bring emphasis to content.

ClickTale.net lets you watch users use the site, and has “heatmaps” that let you see what ares users are drawn to your site.

It has some other basic tracking features, but it’s real value is the recorded visits and heatmaps. It’s really worth checking-out.

TeamViewer teamviewer.com is a free VNC program ( control a remote machine from your machine), that is very easy to set-up and use.
Highlights are:

• Free for public use
• Cross-platform friendly (OSX and Windows, no Linux though)
• Breaks through firewalls
• Uses an uber-strong backbone connection, so less lag than a VNC that uses public networks

Specials shout to JMSTP for introducing me to it.

Safari 3 had an issue with computing this following style statement that was placed at the top of a CSS file, which in turn was imported into another CSS document and that document was called in by an HTML document.
So basically; index.html: –> css.css: @import url(/css/index.css); –> index.css had the offending code:

@charset "UTF-8";
/* CSS Document */
#col1 {
float:left;
width:250px;
}


Removing the character set statement and the comment “CSS Document” fixes the issue.
So:

#col1 {
float:left;
width:250px;
}

Works.