Page is a not externally linkable
buckworks - 9:36 pm on Jan 23, 2010 (gmt 0)
Having a keyword in the domain name might convey a slight advantage but even so, the owner would have to do the right things with it.
So far as we know, the .tld does not carry any inherent advantage or disadvantage. The ranking potential of a .pro site (or any other .tld) would depend entirely on what the owner did to develop and promote it.