For centuries the main Muslim argument for the Muajezat Al Quran, the miracle of the Quran, has been the challenge thrown out by Muhammad 1400 years ago, "You produce poetry this good if you don't think mine is from God (Quran 10:38)".
I've always thought the Prophet's argument (or Allah's depending on your perspective) was quite juvenile. Determining the best poet is like choosing the best musician on American Idol - it's all subjective. Not only that, in Muhammad's version of Saudi Arabian Poet the runner-up lost not only the contest but her head as well. Muhammad was so threatened by the poetry of the Jewish poetess Asma bint Marwan that he sent one of his brave Mujahidin to kill her at night as she laid in bed with her nursing child. Can you imagine what he would have done to someone who wrote poetry claiming it was from God and equal to his?
Actually, we don't need to imagine. When Muhammad conquered Mecca, the city from which he had fled 10 years earlier, he had a list of people who were to be killed "even if they were seeking protection behind the curtains of the Kabah". One of these was Abdallah bin Saad, who had previously copied Muhammad's revelations but then left Islam. According to these sources, Abdallah made suggestions to improve Muhammad's recitations, but when Muhammad accepted the improvements, Abdallah gave up all belief that the recitations were from God. The Prophet certainly didn't want to take a chance Abdallah would produce poetry similar to that he had heard from Muhammad, or spread the news of how he had improved Muhammad's recitations, so he was killed. A woman named Fartana committed the crime of "singing satirical songs about the Apostle", and she was killed as well. I find it interesting that on the one hand Muhammad would challenge people to produce poetry like his, and then on the other certainly kill anyone who tried. And I find it amazing that Muslims today see this as evidence of the inspiration of the Quran.
It's not really that difficult to produce poetry equal to the Quran. Surah 108 describes a mythical river in paradise named Kauthar and the first ayah is Innana Ataynaka Al Kauthar (We have given you Kauthar). In a conversation between a Kafir and a Mumin (a non-Muslim and a Muslim), the Kafir said, "I can produce poetry as good as the Quran, and here is an example: Innana Ataynaka Al Fauthar." When the Mumin asked, "What is Fauthar?", the Kafir replied, "It's the river next to Kauthar!"
With non-Muslims around the world beginning to examine not the poetry but the content of the Quran, and Muslims unable to respond to that criticism, they are increasingly resorting to other techniques to prove its miraculous nature with websites like this one. One of these techniques is numerology, or assigning spiritual significance to the repitition of a word in the Quran. Many online articles emphasize that the word Al Yaum, which means the day or today, is mentioned 365 times in the Quran.
I find it quite impressive that Allah would choose the calendar of the Kuffar rather than that of the Mumineen to express his miracle. It is the pagan Julian calendar that has 365 days, not the Islamic lunar calendar with ten days less. Muslims, of course, argue this only increases the validity of the miracle - it was intended to persuade the unbelievers!
Speaking of numerology, the word Muhammad is mentioned 4 times in the Quran. Guess how many times Khanzeer (pig) is mentioned? You are absolutely right. Now there's a miracle for you!