Can someone please provide a simple shortcodes example. I have created several text fields in my siteconfig, such as SiteTextURL, which stores the domain name of the site. In a template I know I can call, $Siteconfig.SiteTextURL, but this doesn't work inside tinyMCE's htmleditor field (for $content). I'd like to create a simple shortcode I can insert into tinyMCE whenever I want the value of SiteTextURL to be shown.
I reviewed the "Using Short Codes to embed a YouTube video" tutorial on SSBits, but it seems overtly complex.