Lambda the Ultimate

As I am starting to learn Common Lisp, it would be great to do so using an easy to use environment/IDE. What would you recoomend?
My OS is primarily Windows, but would also consider Linux options.

thanks,

Wheat is a programming language, library and environment for creating internet programs. Its target audience is developers of small to medium sized dynamic web sites. Wheat's goal is to be the kind of environment you'd write Wiki or blog software in.

Wheat takes a fundamentally different approach to web programming than common web scripting systems. In Wheat, all objects exist in a single hierarchical name space, which in turn maps onto the URI name space. Hence, all objects in Wheat have a URI, and are accessible via the web. The Wheat virtual machine is in fact a web server. Requests via HTTP are mapped to objects, which are then rendered via XML templates, usually to XHTML, and then returned.

Just stumbled across Wheat and thought people here might be vaguely interested. At first glance, a bit like Squeak via a web server. It has been mentioned only briefly before.

I just glanced through this tutorial, but since I know quite a few LtU readers are into proof theory, I thought I'd share the link.