sbhttpd is a CGI server that run ScriptBasic scripts to generate HTML related content. It doesn't serve up images or process standard HTML documents.
I would only run standalone in an intranet application based environment. Using Apache as a front end web server provide the security, load leveling and media services. I have only used sbhttpd as a proxy application server. It's light weight (500KB) and runs as a service. (always on)