README.md in lead_zeppelin-0.1.2 vs README.md in lead_zeppelin-0.1.3

@@ -2,10 +2,12 @@
 
 Fast, threaded client for the Apple Push Notification Service.
 
 ## Installation
 
+Lead Zeppelin requires Ruby 1.9. It is tested on MRI. Because it uses threads, it probably runs better on JRuby and Rubinius, but has not yet been tested (feedback welcome).
+
 Add this line to your application's Gemfile:
 
     gem 'lead_zeppelin'
 
 And then execute:
@@ -68,9 +70,10 @@
 5. Create new Pull Request
 
 ## TODO
 
 * *TESTING*
+* Gateway and sandbox mode
 * Way to handle errors asynchronously using a pool
 * Performance and concurrency speedups
 * Edge cases
 * Documentation (code level and regular)
 * Length checking for payload, possibly an auto truncating feature
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