so lets pun on this way
Intel X25M G2 80GB
Corsair F60

assume both at same price, which to get ?

I will still stick to Intel SSD anyway.
Since own both of them, since the day i switch to ssd,
everything no need to wait looooooooooooooong looooooooooooooooooooong until i butthurt

If you're budget sensitive, waiting may be a good idea, as the Vertex 3's introduction will surely depress the Vertex 2 prices. But only if you can avoid the temptation of buying new shiny hardware.

And I also think that most people won't be able to appreciate the difference between an SSD with SATA2 or SATA3 interfaces. Unless you find yourself regularly wishing your data can be copied at 400-500 MiB/s, a 'slow' 200 MiB/s should suffice. SATA3 won't improve on the access time, you're already getting that just by switching to any SSD.

Seriously considering to get SSD. My current MB don't support trim, would that be a problem?

Unfortunately Intel's G3 is specced to 250 MB/s sequential read and 170 MB/s sequential write. Still much slower than SandForce's best. However, there are expectations that the G3 will double capacity for the same price. Coming up sometime this quarter (Janaury-March). Potential buyers may be torn between extreme performance and limited capacity of SandForce SSDs or Intel's good enough performance and twice the capacity.

Source: Intel's 3rd Generation X25-M SSD Specs Revealed

People may think that more performance is better, thinking they'll simply be careful to use their capacity and moving things to and fro from their 1TB drives. But having already owned two SSDs, I'm preferring more capacity and good enough performance myself.

The initial MRSP for that is USD289. It is a good price.

I think it's using the SATA2 SSD and thus deliver the speed of 260MBps.

The new Macbook AIR is running on a Sandy Bridge system.
SATA3 SSD should be supported.
It would be a beast if SATA3 SSD is used.