Then I encourage you to check out www.wetheusers.net.
- Posts use markdown syntax (easy, even on mobile)
- You can post some posts friends only
- You can comment, and reply to comments!
- You can private message each other - and read the thread of messages
- You can chat in real time with one another
- You can add yourself to a directory of users to make yourself discoverable
- You can browse the firehose of everybody's content really easily
- The mobile interface is beautiful and minimalist on phones and tablets
- You can choose to have as many, or as few events wired up to send email notifications as you want - and still not miss notifications even if you switch email notifications off - the site records them for you anyway!