Hi
Could you be more specific as to what you want to do.
deny tcp host x.x.x.x any eq 80
says "do not allow the host x.x.x.x to talk to any machines on port 80". Is this what you want.
deny tcp any host x.x.x.x eq 80
says "do not allow any machine to talk to host x.x.x.x on port 80.
the command
ip access-group "acl_name" in
under interface config mode should work. What happens when you do a
sh run int fa0/0
do you see the config applied ?
Jon