VPN through another VPN question

[mplspilot]

I have a Mini with regular 10.6 (non-server), I have set it up to run the built-in VPN server. I can connect to it no problem from my MBP and iPhone, remotely and on local wi-fi and use internet through it.
I also have an openvpn client (tunnelblick) on the same Mini, I use it to connect the Mini to a US VPN server, again no problem there.

Now, what I want to do is run the VPN client on mini to connect it to the US server. Then I want to VPN into Mini and use internet through it, while it's connected to its own VPN.

The issue is, when it's logged in to its own VPN, I can connect to it, but I do not get internet.
How does one go about fixing this?

Thanks in advance.

 

[assembled]

you will need to run NAT on the Mac Mini so that the traffic from your other devices appears to be from the Mac mini

 

[Giuly]

You know that a VPN does not reach theoretical bandwidth of your connection, right? So instead of i.e. 16MBit/s, you get 12MBit/s through the VPN. Now add another one and it makes it 8MBit/s.

What's the problem with configuring your iPhone and MacBook to use the US VPN directly? This is it's intention.