Yep, which ended up helping NVIDIA when they decided to make their version of SLI, which works a bit differently than 3dfx's.
When SLI first came out it was really just a joke...expensive graphics cards, performance wasn't that great and the drivers were just horrid. Now it's definately matured and a good way to get great graphics if you have the extra money.
Don't get me started with SLI Memory though.
Just another gimmick by NVIDIA.
Like I said a while ago, next thing you'll see is NVIDIA putting two hard drives in RAID and calling it SLI HDD.