Does anyone know of an application or web site that allows you to "subscriber" - per se - to specific Craigslist posts? My wife and I are looking for a few things on Craigslist, including a job position, a bicycle trailer, and a new apartment. We are also looking in three different areas of the Northwest. So, as you can imagine, things get pretty hectic, and we may forget to check a certain area for that specific post. Got any ideas?