Westlake Village Aikido logo by Scott Cattanach
While you are welcome to purchase training weapons from any supplier you wish, provided what you order will hold up to full-contact strikes, there are two suppliers I recommend above others: Nippon Budogu and Kingfisher WoodWorks.
From Nippon Budogu I recommend the Aikido Heavy Bokken (formerly the Iwama-Ryu bokken).
From Kingfisher WoodWorks I recommend the Iwama Bokken or the Enhanced Iwama Bokken (direct links not available).
From Nippon Budogu I recommend the White Oak Jo.
From Kingfisher WoodWorks I recommend the Jo or the Enhanced Staff (direct links not available). The height of the jo should correspond to your armpit height.
I recommend Tozando hakama. My personal preference is the Tozando Polyester Aikido Hakama "UME". I recommend contacting Tozando to get extended front straps to allow for greater range of tying styles.
Aikido Journal is the best place for general Aikido information and materials (DVDs, books, etc). Run by Stan Pranin Sensei, it started as the best Aikido magazine in print but has since evolved into a strictly online resource.
Aikiweb is a good Aikido information site and includes a very convenient dojo finder.
No Nonsense Self-Defense is a site run by Marc "Animal" MacYoung. Marc "Animal" MacYoung is one of the most knowledgeable martial artists in the world. This site is an amazing martial arts/awareness/fighting resource. You can learn more from this website than you can from most martial arts classes. Marc "Animal" MacYoung is also the author of many valuable self-defense books which can be purchased from most major online bookstores. I highly recommend all of them.
Takemusu Aikido Association. Austin Iwama Aikido is a member of the Takemusu Aikido Association.
Aikido Iwama Ryu Europe lists many Iwama Ryu websites for dojos located throughout Europe.