It's About Time. Germany Rules Religious Circumcision on Boys is Assault, page 4

Not to sound too "medical", but there is information regarding reasons for medical circumcision. circumcision link

Recently, however, several large studies revealed a 60% decrease in HIV transmission in circumcised males compared to uncircumcised males

I remembered when my son was born, April a year ago, I had tons of questions for the ob/gyn about stem cells, circumcision,etc.. When I saw these threads popping up yesterday I thought about replying, but I was too tired to do any research. But, this was one of the reasons he said it was a legitimate procedure.

Three problems that can arise

if not circumcised: Phimosis, Paraphimosis, Balanoposthesis

Problems with the circumcised penis: Meatitis

Probably the reason why circumcision is still preformed in 60-75% of new born males:

The incidence of urinary tract infections in male infants appears to be lower when circumcision is done in the newborn period. It was first reported in 1982 that urinary tract infections (UTIs) are more common among infant males than they are in infant females (this switches later on in life). In this study, it was revealed that about 95% of the infected infant boys had not been circumcised. This risk is especially significant in infants less than 1 year of age. Many studies have shown that uncircumcised infants have a tenfold increased risk of developing a UTI than circumcised infants.

Circumcision prevents the growth of bacteria under the foreskin and this, in turn, protects male infants against urinary tract infection. The high incidence of urinary tract infections in uncircumcised boys has also been found to be accompanied by an increased incidence of other significant infections such as bacteremia (bacterial infection of the bloodstream) and meningitis (infection of the covering of the brain). The protective effect of circumcision may thus extend to a number of infectious diseases.

Now, that is all from the perspective of protecting the infant. For adults there are other reasons:

There is a higher risk of gonorrhea and inflammation of the urethra (the tube that carries the urine from the bladder outside) in uncircumcised men. It has also been reported that other sexually-transmitted diseases (such as chancroid, syphilis, human papillomavirus, and herpes simplex virus type 2 infection) are more frequent in uncircumcised men. As mentioned above, most recently three large studies performed in Africa documented that circumcision was protective with respect to the acquisition of HIV infection as compared to those uncircumcised subjects.
Circumcision prevents the growth under the foreskin of the agents that cause sexually-transmitted diseases. Removal of the foreskin may provide some measure of protection from these diseases to males and their mates.

What is the correlation between sexually-transmitted diseases and cancer of the cervix?
There is a strong connection between sexually-transmitted diseases and cancer of the cervix. Human papillomavirus types 16 and 18 (as well as other less common HPV types) are causes of precancerous changes in the cervix and cervical cancer. The strongest predisposing factors in cervical cancer are a history of intercourse at an early age and multiple sexual partners. An HPV vaccine is now available and recommended for all teenaged girls, and when given before the first sexual encounter, it has been shown to be protective against the most common HPV types associated with malignancy. The vaccine presumably prevents cervical cancer associated with these specific infections but is unable to prevent cancers arising from infections with less common HPV types not contained in the vaccine. Therefore, routine screening for precancerous changes in the cervix is still recommended.
What might this relationship between lack of circumcision and cervical cancer mean?
Circumcision may partially protect the mate from cancer of the cervix by removing the foreskin which harbors sexually-transmitted viruses (HPVs) that promote this common form of female cancer.

and Penis Cancer:

The predicted lifetime risk of cancer of the penis in an uncircumcised man is one in 600 in the U.S. Cancer of the penis carries a mortality rate as high as 25%. This cancer occurs almost exclusively in uncircumcised men. In five major research studies, no man who had been circumcised as a newborn developed cancer of the penis. Human papillomavirus types 16 and 18, which are sexually transmitted, are involved in cancer of the penis.

All of the info in the post is from here
I'm not sure if I used the correct quotes