Hoople - 2:24 pm on Jul 11, 2011 (gmt 0)
A point to also keep in mind is the title displayed in downstream search partners is sometimes 1-3 characters less before they show the elipses (....). So what you can see on Google may not show fully on their parners.
The WW 'reference' I used in the past was http://www.webmasterworld.com/google/4144296.htm#msg4145279 [webmasterworld.com] I would revise the 70 characters maximum length recommmended in that post down 1-3 characters, possible more. Test it!
Really long titles may not be best unless this page's place in your niche cannot be described adequately otherwise.