Possible Duplicates:
How do you contact a StackOverflow user?
Routing a Question to a Particular SO Member or Members
Hai guys, How to ask a question to a particular user of stackoverflow.com .... Is there any way...
Possible Duplicates:
How do you contact a StackOverflow user?
Routing a Question to a Particular SO Member or Members
Hai guys, How to ask a question to a particular user of stackoverflow.com .... Is there any way...
Unless the user has put their contact details (email address or blog details) into their profile I think you can safely assume they don't wish to be contacted by other Stack Overflow users.
You could try leaving a comment asking them to contact you under one of their posts and they might get back to you.