I was just online submitting a trouble ticket to a company and while entering the information a bunch of knowledge base articles started popping up underneath the web based input form. One of them had the answer to my question so I didn't even need to submit the ticket. This is the best implementation of an online help desk that I've seen yet. Most of the time I'll skip over reviewing the FAQ or online knowledge base because they are typically useless to search and get the info anyway. But this was a nice way to present it.

Looks like they are using Kayako Help Desk stuff.