THIS GROUP IS FOR COMMUNICATING WITH 汉字 ONLY. (Sorry for screaming in all caps, but it must be emphasized.) Keeping that condition in mind, please join and make a post about (almost) anything you want, and of course, please participate in other discussions as much as possible so that this group can thrive. Although the forum is fairly open, avoid topics and comments that are considered 'sensitive' as it is hoped that this group will be inclusive and not exclusive. 中国人欢迎你们来参加!
If you have trouble expressing something you want to write, first write your idea out in 汉字 as best as you can, then highlight the questionable text, and finally go to the 'I Have a Question' group to ask your question in English (http://chinesepod.com/community/groups/view/212).
Are there any exceptions to the 汉字 only rule? Yes, occasionally writing an English word or acronym is acceptable if for some reason it would be strange or difficult to write it in 汉字 (such as some proper nouns). No complete sentences in English, though!