Hi,
I'm collecting blog posts and articles covering CHAR(10). Fonud these so far:
http://people.planetpostgresql.org/devrim/index.php?/archives/46-CHAR10-Day-0.html
http://blog.tapoueh.org/articles/blog/_Back_from_PgCon2010.html
I put up my brief retrospect here:http://www.postgres-r.org/about/news/char10
Regards
Markus