Motive Software does this (Score 1)

The software from Motive allows users to go to a webpage and submit incidents via a specific problem area. A general diagnostic specific to that area is then run on that local PC and sent back to the queue where it can be picked up by a qualified IT member. Right now the incident in the queue is picked up by software(not via webpage) but I can see how it might be done in the future.
Content is also downloaded to the local PC so that when Internet connectivity is down, there is some help on getting it back up.
Disclaimer: I am currently a Motive employee and might be biased towards our product.