I have a problem with pinging other people, I get request timed out.
After some tweaking and reading stuff about those firewall things, I got my icons on other people from blue (relayed tunnel) to green (direct tunnel).
I'm not sure how, but these are the things I did.
In Hamachi > System > Preferences > Settings > Advanced Settings > Peer Connections
Local UDP Address > Smaller Box : 45565
Local TCP Address > Smaller Box : 45566
And in my router settings, I portforwarded 45565 for UDP and 45566 for TCP.
I also allowed them in my Inbound Rules and Outbound Rules on my W7 Firewall.
Hope this helped.