With the waning economy I know that a lot of us are looking for work.
Unfortunately, the fallen economy and the loss of jobs also means that the number of jobs available is tragically low. So what can you do to facilitate your search? How can you find out if an attractive company is hiring, or in what capacity? How do you communicate this interest?
WriteExpress is a resource site that provides templates for over 4,000 different kinds of letters. A great, stock resource to get you going, I do not recommend a straight plug-and-chug for letters as important as those related to potential jobs, careers, new hires, etc. That being said, their page on writing a request letter is a wonderful resource, offering professional tips.
More than this, however, it is important to be persistent in your search as this is as important as effective communication. When writing your request letter, think about why specifically this is a company for which you would like to work or why a particular position is one that you are actively seeking. Be as specific as possible, even in a simple request. Again, you do not need to provide your complete work history, and your CV is most likely overkill on a request; however, your letter should communicate a the potential relationship between yourself and the job.