README.md updates

Author: fge

README.md

@@ -4,11 +4,25 @@ This repository contains the current, and historical, JSON Schema
 specifications, along wit a CommonJS implementation (authored by Kris Zyp, one
 of the initiators of JSON Schema).
 
+## Call for reviews
+
+Specifications are starting to get written. Reviews, comments and suggestions
+are of paramount importance to JSON Schema. It is humbly asked to you, dear
+reader, that you bring your contribution.
+
+Proposed specifications are here:
+
+https://github.com/json-schema/json-schema/tree/next/proposals
+
+## The wiki
+ 
 The <a href="https://github.com/json-schema/json-schema/wiki">wiki</a> contains
 a detailed description of JSON Schema, and discussion about the next version of
 the specification.
 
-See also the JSON Schema web site: http://json-schema.org
+## The website
+
+The JSON Schema web site is at http://json-schema.org
 
 Note that the content of the aforementioned web site is available from this
 repository (branch <tt>gh-pages</tt>). Pull requests to improve the content of