a small example demonstrating the problem with symbol macros..

symbol-macro-problem.clj

(ns symbol-macro-problem
  (:require [clojure.contrib.macro-utils :as m]))

(defmacro sym-macro [& body]
  `(m/symbol-macrolet [begin :begin
                       end :end]
                        (println begin)
                        ~@body
                        (println end)))

(defmacro display-local-bindings []
  `(do ~@(map (fn [x#] (list 'println  [`'~x# x#])) (keys &env))))

(sym-macro
 (let [x 10]
   (display-local-bindings)))