I think I have a few that might interest other readers. The first is a great retail place (no affiliation to myself) - http://www.e-bogu.com. Very high quality equipment for all sword arts.

The second is a series of articles by author Dave Lowry - http://www.koryu.com/library/authors.html#dlowry. Mr. Lowry is an exceptional writer and, by all accounts, a skilled sword practitioner.

The third is my own modest blog - http://www.ikigaiway.com. I write about a lot of sword concepts in conjunction with other martial arts related topics.
Ikigai | Blogging the Martial Way