S97 only applies to those children who are subject to court proceedings.
You are very welcome to blog here and write forum post on an anonymous basis (ie no naming of your children or ex etc).
The problem with going openly public about your situation and naming those involved is that this may well have a negative effect on attempts to come to an agreement as your perception as displayed on your public blog may well influence how your ex approaches the discussions - ie if you sound off about her or write about her negatively and she reads what you've written about her.
There is also the impact this may have on your children - you would be putting them openly into the public arena and identifying them. This could lead to peer issues, not to mention that campaigners with an agenda could make use of your blog to further thier own agenda and thus exploiting your children. Sadly I've seen this happens far too many times.
Writing down your experiences is an excellent idea and will most likely be extremely cathartic as well as providing you with a detailed chronology of this part of your life. As I said earlier you are very welcome to blog here on an anonymous basis.