This is post is not exactly what we've been asked to do....
I have had a play with Rollyo, created a search engine on the topic of holden adding a couple of web pages to the search pool but I think I picked a bad day.
I am not creating a link to my Rollyo profile at this stage simply because there seems to be a problem with the site today. Every time I hit the 'create' button the site timed out and I lost the information I put in.... so I've given up for now.
I love the idea and I will come back to this on a day when hopefully the site is happy to accommodate me. This looks like it will be a fantastic tool for directing student research on a given topic, ensuring that their information is from sources that you trust.
Check back later, if I manage to get this site working I'll place the link here =)