Chi
So far, this is the best book I've found for experiencing Chi. Bruce Kumar Frantzis gives a very straightforward, easy to follow and implement description of exercises that you can do. He strips away the mysticism and gives clear, concise instructions that bring you the benefit of his years of study.

Here's a summary of the book description:
Opening the Energy Gates of Your Body introduces the key concepts of chi gung in a manner both accessible and understandable to Westerners. With fascinating insights gained from years of training in Asia as a warrior, healer, and priest, Bruce Kumar Frantzis demystifies the concept of "chi," the body’s vital energy life force, and shows why this 3000-year-old system of self-healing works. The book provides a set of enjoyable, low-impact exercises that readers can learn on their own, including standing chi gung, a core exercise that effectively boosts performance for martial artists, athletes, businessmen, and others. Body alignments and Taoist breathing, fundamentals that are the foundation of all Taoist energy practices, are also taught, with special alignments that benefit those who must sit for long periods of time.
The most established regular magazine about Chi is the Qi Journal.
Chi
Medical Disclaimer: This site does not give medical advice. Please consult your doctor before trying anything discussed here.
Tai Chi
Many styles
Yang Style
http://www.chebucto.ns.ca/Philosophy/Taichi/
Lineage of each style and of each group that practices
Name
Tai Chi
Tai Chi Chuan
T'ai Chi Ch'uan

What is Tai Chi
http://www.chebucto.ns.ca/Philosophy/Taichi/what.html
http://en.wikipedia.org/wiki/T'ai_Chi_Ch'uan

One of the avowed aims of Tai Chi is to foster the circulation of this 'chi' within the body, the belief being that by doing so the health and vitality of the person are enhanced.

Chi Gung
Names
Qi Gong
QiGong
Chi Kung
Ch'i Kung

The Sounds
K-G
' indicating glottal stop

Styles
Martial qigong
Tendon Changing Classic
Marrow Washing Classic
Iron Shirt Chi Gung
Medical
Spiritual

Categories
Moving Chi Gung
Still Chi Gung

Types of Chi Gung
Water
Fire

The Dangers of Chi Gung

Common Themes among schools
Although each school adopts unique methods, they all agree on the basic importance of regulating the mind and deepening the respiration

Regulating the Body
Regulating the Mind
Regulating the Breath

Xingqi

Neigung

The word
Chi
Qi
Ki
Prana
Ch'i

Definitions
Chi
Energy
Life Energy
Vital Force
Life Force
Gung
Work
Daily effort
Skill acquired through practice
Practice
Chi Gung
Energy Practice

The Characters and their derivation
Chi
steam rising from a pot over a cooking fire
Gung

Schools of thought
Chinese
Philosophy
Medicine

Definitions
a vital force that animates the body

Chi circulates in patterns that are closely related to the nervous and vascular system and thus the notion is closely connected with that of the practice of acupuncture and other oriental healing arts.

Related Arts and Sciences
Acupuncture
Acupressure
Massage
Healing Hands
Traditional Chinese Medicine (TCM)

Related Science
Magnetism
Magnetic fields
Electronics
Field theory

Uses
Self-healing
Martial Arts
Healling others

Types of Chi
original energy
energy from food
energy from surroundings

Publications
Qi Journal
http://www.qi-journal.com/
Books
http://www.qi-journal.com/qigongcatalog.asp?vendor=insight
FAQs
http://qi-journal.com/Qigong.asp?-token.SearchID=QigongFAQ
Related Works
Paper: "Practice On Qigong Therapy", by Liu Gui-zheng, 1953
Prior to that date, there were many terms given to such exercise, such as Daoyin, Xingqi, Liandan, Xuangong, Jinggon, Dinggong, Xinggon, Neigong, Xiudao, Zhoshan, Neiyangong, Yangshengong, etc.
Explanations
http://en.wikipedia.org/wiki/Qi
Star Wars
The Force