Hombu Time Table
( hombutimetable.com )

This site checks the schedule on http://www.aikikai.or.jp/eng/ and lays it out in a very easy to understand format.

For anyone who visits the Aikikai Hombu Dojo its a great resource

"Guide to Practice at the Aikikai Hombu Dojo"

If you do Aikido, at some point you'll probably want to visit Hombu Dojo in Tokyo.  Guillaume Erard has a great guide here for anyone visiting.  It points out many of the rules and etiquette that you need to observe.

Example, in the second floor dojo there are 2 doors right next to each other.  One is for the students, the other reserved for the Sensei....... which will you walk through?  The left door or the right.