I currently have SMF 1.1.4 and WordPress 2.5 integrated and working well together. What kind of problem are you having?
Yes, I am running WordPress 2.3.2 and a forum running SMF 1.1.4 and they are integrated so if a user joins one they are automatically joined at the other with the same name and password and they only have to login in once to have access to both. I am using the WP & SMF 1.09 plugin.