Submission to God. It stresses humility and charity and has historically been
relatively tolerant to other faiths compared with Christianity. The Qu'ran for example generally stresses compassion and tolerance of "people of the book" (generally interpreted to mean Monotheists - Jews and Christians, but sometimes expanded to include Hindus and other faiths). There's even a passage that says something like (and I'm paraphrasing) "there shall be no compulsion in religion" and one that says that "Jews, Nazareans (Christians), and Zoroastrians will have their day with the lord."
That said, like any religious book, there are both tolerant passages and warlike passages. Muhammad was both a religious leader and a political leader, so there are passages in the Qu'ran, written during times of war and conquest, that urge Muslims to "slay the unbelievers" and to "slay the infidels." Those passages of the Qu'ran are more akin to the Old Testament than the New Testament.
The biggest emphasis on Islam is in charity. Islam is constantly calling for compassion and justice for the poor. One of the five tenet of Islam is the Zakat - a tax on all Muslims for the purposes of charity.
The place of women according to the Qu'ran is mixed. Like many faiths, although probably better than a literal reading of the Bible. Women are seen as the equal of men before the Gods, and some progressive Muslims insist that women should be considered able to be in the clergy, considering that many early leaders of Islam and early followers of Muhammad were women - including many that led his first prayers. Muhammed's wife was also a rich merchant-woman. Some have said that Islam was impacted by the earlier Arabian mentality, where, like in many nomadic societies, women enjoyed a higher place than in sedentary societies - the impact of more settled areas like Mesopotamia led to greater seclusion. The veiling of women comes from pre-Islamic customs in much of the Arab world.
Islam shares quite a bit with Judaism and Christianity. In fact, many scholars have pointed out that Islam is actually more similar to Judaism than Christianity (ironic given the rampant anti-Semitism in many modern Islamic societies). Sh'aria was a set of laws that governed Islamic society at the time of the Qu'ran and that is codified in the Qu'ran, much like Mosaic law is codified in the Torah. There is generally a big debate in the Muslim world (which the fundamentalists are currently winning) over the role of Shariah. Some argue that strict Shariah law must be implemented in line with ancient times (in truth, it was probably never as dogmatic - the rise of modern communications means that totalitarianism can exist where none previously could have). Others argue that it needs to reinterpreted in the light of modern-day teachings. Still others say it should influence but not dictate modern law. Still others say it should be replaced with modern secular law.
Ultimately, Islam, like any faith is highly complex. There are beautiful aspects to it and uglier aspects. There is plenty a progressive, tolerant Muslim can latch onto but also a lot that a fundamentalist can latch onto. Religion is like that.
For info on Islam, some good places:
This is a great discussion on the place of tolerance and modernity in Islam - very balanced, very fair, very thorough:
http://bostonreview.net/BR26.6/elfadl.htmlhttp://en.wikipedia.org - do a search for Islam, also search a history of the crusades - it's quite enlightening.
http://www.religioustolerance.orgAlso, try this book:
http://www.amazon.com/exec/obidos/tg/detail/-/0679640401/qid=1121020537/sr=8-1/ref=sr_8_xs_ap_i1_xgl14/104-9322753-8692708?v=glance&s=books&n=507846AND this one:
http://www.amazon.com/exec/obidos/tg/detail/-/0345384563/ref=pd_sim_b_2/104-9322753-8692708?%5Fencoding=UTF8&v=glanceFor a more negative view of Islam, try this:
http://www.amazon.com/exec/obidos/tg/detail/-/0312327005/qid=1121020640/sr=8-1/ref=pd_bbs_ur_1/104-9322753-8692708?v=glance&s=books&n=507846And for a more positive view:
http://www.amazon.com/exec/obidos/tg/detail/-/0060582723/qid=1121020640/sr=8-4/ref=sr_8_xs_ap_i2_xgl14/104-9322753-8692708?v=glance&s=books&n=507846(Actually, both call for largely the same thing - just the first has a more negative view of the history of Islam, the second a more positive view)
Also, you might want to look into Sufism which is a very tolerant, liberal, mystical form of Islam that has historically been very popular in Iran, India, Central Asia, and generally in villages and among lay people (it's been under attack by fundamentalists for decades and has thus dwindled in much of the Arab world, where it once was highly influential, particularly in Egypt).