Not too many I bet! The 'client' is a massive 530MB download! I checked.

Eve is a space based MMORPG

But interesting question. Who has played a MMORPG in the past? It can be either text based (browser based) or with a specific client that you have to download.

I have played the Legend of the Green Dragon (browser based) for a little while. It can get quite addictive (esp when you get to the levels when you can challenge and kill the Green Dragon).