At least 80000 ping?

[SOX]

Moving information at the speed of light it will take anywhere between 4 and 20 minutes to travel one way between Earth and Mars, which means there will never be any real time games between the two planets.

Source (http://www.edge-online.com/blogs/will-we-ever-game-against-mars)

[AranchineD]

So basically if we all travel to Mars we'll get better pings than playing in Australia?

[dimorphic]

So basically if we all travel to Mars we'll get better pings than playing in Australia?

Precisely.

[Slippery]

That's why they changed the speed of light in 2241

http://www.theage.com.au/ffximage/2006/01/05/futurama_0601_wideweb__470x330,0.jpg

[Cerebral]

Earth v Mars Advance Wars Invitational '69

[SOX]

Turns out my maths was terribly wrong to when I wrote the title, it's probably more like 480000 ping (1000 ping is a second right?).

[Fenrir]

Ping is measured in milliseconds from memory, yes.

Not much to say here - it'll be turn-based strategy until the quantum field theorists get back to us with the relevant breakthrough.

[AranchineD]

I think the universe would implode if you ended up playing a round of Civilization against someone living on Mars

[SOX]

There may be some hope!
Apparently there is a tiny chance Mars could collide with Earth (http://news.bbc.co.uk/2/hi/science/nature/8093005.stm) in the future - which while being terrible, will be great for interplanetary ping before the event!

[Australian Ninja]

Hooray for junk science!