You can either use Javascript-based counters or simply a perl counter you call via SSI. In case you use templates you just implement your counter on home.html or any other template you want to have counted. If you use SSI calls do not forget to change the build extension in links.cfg to .shtml.
2) Like thomas stated, you could use a javascript counter (although quite unreliable and not interoperable between some browsers and internet devices - PDAs and Internet appliances).
3) Learn some Perl and come up with your own custom script.