Wow so many replies here since I started this thread some time back.
Apologies I have not replied to anyone, literally flat out with work here so I haven't actually checked this threat much since then. Actually I am still building my robot slowly... It now also had a Wi-Fi operated claw to pick up/move objects remotely and a self charge mechanism. Will post some pics/movie when I get a chance to finish it one day.
A PM from someone prompted me to check this thread, I hope everyone was able to rectify their issues and have their questions answered.
If the instructions are followed correctly from the first page, you should have no issues.
If not then please factory reset your unit and start again. Note I only tested this with a particular camera (HD-3000). Some cameras may use different drivers which may require additional or different steps to set it up.
Please note, there is a continuation of my original guide (1st post of this thread) on the 8th post of the first page for faster streaming using mjpg-streamer. Please take note of that as well.
Also there may be an easier way of setting this up now since the Yun has been out for some time. Not sure as I haven't tinkered with it for some time..
Also this may be of use to some:
Best of luck with it