I have sku.28899 from DX here. Fits flush with the case, and works very well: AHCI, full 2.5gb/sec PCIe-x1 speeds, NCQ, port multiplier support, hot plug (drives and card), etc..

If JMicron chips work with Mac computers, then this is a good one to consider.

Edit: This thread suggests it should work just fine with Leopard and later. Or maybe not?

Edit: I just clocked sequential, non-NCQ throughput of 155MBytes/sec here, with a 240MByte/sec SSD plugged in at 3gb/s.

Cheers