Hi everyone 
I´ve waited a little bit before posting this. Thought it´s maybe just the fault of my provider.
The problem as mentioned in the title is that I´m having massive and strongs lags while playing online with other people.
First I´ve played a few games against the AI only. You can see the result on this screenshot:
http://img241.imageshack.us/my.php?image=singleplayertt8.jpg
You have to divide 1000 through the number displayed in the upper left to get your current frame rate (thanks to TheBigOne for the information
)
You will notice, that the framerate is good enough for playing.
On the upper right you have the sim time. Not sure what´s the deal with it, TBO asked about it (so I think it´s quite helpful for you, too)
So, now I´ve played a few games online, via hamachi, too. I thought: Ok, maybe I will get a little bit delay because I´m from Germany but it will be not that hard. Ok, seems like I failed in this point 
The result of playing online is the following (screenshot taken in a match with TBO only, he´s from Germany too):
http://img127.imageshack.us/img127/310/multiplayerzs2.jpg
Once again, take a look on the numbers in the upper left and right. You will notice, that I´ve lost near 10 frames 
In addition to that, in online games I´ve got graphical bugs, too. In places the model of the demigods isn´t displayed, only the colored circle around them (but this circle keeps on moving when I´m clicking around).
And it doesn´t seem to be the connections fault (because it also appears in games with europeans).
My computer is maybe a little old, but I think it´s enough for Demigod. I´ve posted my dxdiag in this topic.
Some rough facts:
¤Pentium 4, 3GHZ (HT)
¤7600GT 256mb RAM (updated the driver on thursday)
¤1536mb RAM
¤I´m using onboard sound