Firstly, following is my system: Ubuntu 13.10 amd686, VirtualBox 4.3.8, minix3.2.0
After following steps in http://wiki.minix3.org/Releases/3.2.0/UsersGuide/RunningMinixOnVirtualBox, I found networking does not work. With many tries, I setuped it successfully.
Login the system as root, type netconf comamnd. After selecting the default Ehternet car, I chose to configure network manully. Following is my typing: Hostname [%nameserver]:[blank] IP address [10.0.0.1]: 10.0.2.15 Netmask [255.255.255.0]: [blank] Gateway: 10.0.2.2 Primary DNS Server: [blank] Secondary DNS Server: [blank]
then modify the /etc/resolv.conf as following: nameserver 8.8.8.8 nameserver 8.8.4.4
And finally, reboot the system, and Everything is ok :).