Links:

Ontario Martial Arts (no affiliation to Seikido)

Aiki Budo Centre (London)
Martial Arts Supply--shop to get your gear in London
Aikido Network Training Centre (London)

Other Links

Martial Arts Network
Martial Arts Education
Martial Arts Clubs Directory

Tae Kwon Do:

Official ITF website
ITF information
AKTA.com (American Korean Tae Kwon Do Association)
American Tae Kwon Do Association (ATA)
International TaeKwon-Do Association
TaekwondoBible.com
International TaeKwonDo Federation
National TaeKwonDo Federation
TKD Net tips, hints, techniques, etc.
Ch'ang Hon Patterns reference
Tae Kwon Do Tutor

Aikido:

Aikido World Headquarters - Aikikai Foundation
AikiWeb - a great Aikido resource site
Aikido Journal
Aikido links
Ki Breathing
Rei's Random Ki Stuff
Toronto Aikido Centre
Aikido Online

Body Conditioning:

ExRx: excellent resource on fitness.
John Berardi's resources and articles.
IFA: Stretching resource guide.
Tom Kurz: excellent stretching resources