I love RSS. I love my aggregator. I want the two to work in harmony for a long, long time. If I understand correctly, several blogtool vendors are making up their own versions of rss as they go along. Most of these new formats won't work with my aggregator unless adaptations are made. This doesn't make any sense to me, if you want your blogtools to become popular, wouldn't you want the established base be able to read them? Reminds me of railway history, where newcomers developed incompatible 'broad-gauge' trains and tracks. Go ahead and learn from this history, the outcome is as predictable.