I came across a series of interesting posts at another blog recently. It's a bit of a read but well worth it. There is a 3 part series discussing the weaknesses and strengths of different training methodologies, including the age old debate of sparring vs. kata for realistic training. The author doesn't take sides but lays out some interesting pros and cons of each. I found it very interesting and well thought out and researched. Kata lacks a resisting partner while sparring has to have rules to avoid injury.
Check out the blog at http://kojutsukan.blogspot.com
In another blog related matter, Mark's Physics of Aiki blog has disappeared. I hope all is well with him and wish him all the best. I've removed his link from my blog as it is a dead link. Mark, if you come back on line, please let me know and I'll put the link back.