Linguistic creativity - such as coinage of new words, creation of novel metaphors, play with words, and new usages of non-standard spelling - is an important property of human language. The automatic identification of instances of linguistic creativity and the computation of their meaning represent an important challenge for a variety of Natural Language Processing tasks. Social media such as blogs provide new insights into the use of linguistic creativity as bloggers' writings more directly represent modern language than formal texts found in traditional websites and news sources. In this talk, I will present a study of neologisms (newly created words) and metaphors used in Persian blog language and will discuss methods for their automatic recognition. When relevant, comparisons to Blogspeak in other languages (e.g., English and Chinese) will also be discussed.