The seemingly very basic topic of web page Titles comes up very often in discussion about Search Engine Optimization. One reason for this being that the performance of the title has always been something fairly easy to measure. For a while, it was prudent to uses dashes and avoid commas at all costs. Commas were an indicator of keyword stuffing that set off an alarm in the search algorithm; it was widely speculated from analysis of results. Yet, I have seen many top ten Google search results recently with commas.
A thread posted this morning at Search Engine Watch asks about suggested character limitations, the avoidance of so-called "stop words" (and, or,the, where, etc...), and using commas. A quick response from Danny Sullivan summarizes the recent accepted method of building an effective Title. Every SEO will have variations on the subject, and some may want to consider various search engines and how they treat Title structure slightly differently as well. Ironically, when looking for such a variety of opinions, I checked High Rankings Forum and voila! A thread started just yesterday on the same subject.