Welcome to the forum.
We have a good deal of articles right here on this site regarding SSD.
50nm SLC NAND has approx 100,000 write cycles.
34nm SLC NAND has approx 60,000 write cycles.
50nm MLC NAND has approx 10,000 write cycles.
34nm MLC NAND has around 5,000 write cycles, and requires NAND over-provisioning to make sure the drives will last the expected life cycle.
25nm MLC NAND will have around 2,600 write cycles, and will require even more over-provisioned NAND to last the expected life cycle of the drive.
We are now also seeing very smart SSD controllers, such as the SandForce SF1200 and SF1500, which use technologies such as DuraClass to keep write amplification as low as possible.