I ordered MA from Amazon yesterday, but in my rush I didn't notice that you need 256meg of Ram minimum. Since it's now on it's way and I have 128meg of ram, will I have any change of getting the game to work, or should I get another 128meg now ready for when it arrives?

I asked the very same question. I'm waiting until after Xmas to get the game when I'll have more RAM.
Check the link below. Hope it helps.

http://massiveassault.com/forum/viewtopic.php?t=165

Regards
JD

Nice one Jaydee!

In addition:
I've launched MA on my home PC (Duron 600, 128Mb RAM, 32MB RivaTNT2) and managed to play it.

i installed MA on my friends PC - P300 - 196MB RAM and 16MB videocard
and surprisingly it launched but in a small window (size like 320\200)
when i tried to change resolution it crashed
Vic says we should switch it to windowed mode and try to resize it but i have not tried it yet