Say I had 5 sites, each promoting a similar product. I then linked them all together would I get penalised at all by Google?

At the moment I have freeipodsetc.co.uk which is a general site.

Then free-apple-macbook-air.co.uk which is an item specific site.

If I bought freeps3.co.uk and freexbox360.co.uk and then linked all these sites to each other would google penalise.

They would all be hosted with hostgator.

What should I do?

Cheers