Bladder

Tissue engineering and growing "replacement" bladders
Organs Made to Order http://www.smithsonianmag.com/specialsections/40th-anniversary/Organs-Made-to-Order.html

Bladder regeneration
New study into bladder regeneration heralds organ replacement treatment http://www.eurekalert.org/pub_releases/2010-11/w-nsi112310.php

Urge incontence
As we age is can become more difficult to control our bladders. This is nothing to be ashamed of as it happens to the best of us. It would be better though it there was something we can do about it.

One suggestion is Kegel exercises. There are various websites that explain how to do kegel exercises with the most difficulty related to isolating the correct muscles.

Kegel exercises improve the muscles of the pelvic floor to help improve the functioning of the sphincter.

You can use a biofeedback device to help isolate and measure the muscle contraction.

For example NB this is not an affiliate link and will hopefully be replaced with more generic information in the future.

http://www.lifematters.com/pfxa_anal.asp

Another link perhaps closer to the company that makes this product (may be Australian!)

http://www.pelvicfloorexercise.com.au/shop_feedback.htm

Genetics of Hereditary incontinence
Gene Linked to Hereditary Incontinence Identified http://www.sciencedaily.com/releases/2010/06/100607111314.htm

http://adam.about.com/encyclopedia/infectiousdiseases/Urge-incontinence.htm