Agreed, on number 1 you will get alot of answers, and the best way to really get a feel for it is through observation and trial and error. 80 is just as good an answer as 75 or 85, but you really can't look at that number in a vacuum (and apply that philosophy to all attributes as well, everything is interrelated). But to try to give you a direct answer, my opinion is that if you have at least 80 in speed and 75 in baserunning you should be considered a basestealing threat. My opinion, others may differ, is that speed is vital, while baserunning skill just needs to be good, and of course the higher the speed the more you can fudge on skill.
Number 2, yes they are related in that you need both to be a good basestealer. To give you a direct answer, my experience is that no, you won't have a good basestealer regardless of baserunning skill if he is slow, and yes, you can have someone who is fast that is a terrible baserunner, but in my experience that combonation is usually rare. Really fast guys tend to have pretty high baserunning skill. No always mind you, but usually.
If you haven't already, read all the developers chats, you will find all kinds of good answers to questions like these.
6/25/2010 1:32 AM (edited)