As for Razorwire, GW sells two 6-inch coils of model Razorwire for $10. I'm thinking I'll put little bits of corkboard over the bases for my Dark Angels (A friend and I are going to split a Dark Vengeance starter set), and then put sections of razorwire on every third base or something.
As for my own battlefield, what my friends and I do is drape one of those GW "battle mats" (basically a green felt sheet) over a table, stick some terrain on, and call it good.


