Fixes to release notes

docs/topics/3.0-announcement.md

 ## Pre-release notes:
 
-The 3.0 release is now ready for some tentative testing and upgrades for super keen early adopters. You can install the development version directly from GitHub like so:
+The 3.0 release is now ready for some tentative testing and upgrades for early adopters. You can install the development version directly from GitHub like so:
 
-    pip install https://github.com/tomchristie/django-rest-framework/archive/version-3.0.zip
+    pip install https://github.com/tomchristie/django-rest-framework/archive/master.zip
 
 See the [Version 3.0 GitHub issue](https://github.com/tomchristie/django-rest-framework/pull/1800) for more details on remaining work.
 
-The most notable outstanding issues still to be resolved on the `version-3.0` branch are as follows:
-
-* Finish forms support for serializers and in the browsable API.
-* Optimisations for serializing primary keys.
-* Refine style of validation errors in some cases, such as validation errors in `ListField`.
-
 **Your feedback on the upgrade process and 3.0 changes is hugely important!**
 
 Please do get in touch via twitter, IRC, a GitHub ticket, or the discussion group.
@@ -237,7 +231,7 @@ To use writable nested serialization you'll want to declare a nested field on th
             fields = ('username', 'email', 'profile')
 
         def create(self, validated_data):
-            profile_data = validated_data.pop['profile']
+            profile_data = validated_data.pop('profile')
             user = User.objects.create(**validated_data)
             Profile.objects.create(user=user, **profile_data)
             return user