this is a great questions... i have been trying to research this issues for a few hours now. so far i found two individuals who have said it is not possible. however, i intend to buy a mini pcie ssd card and attempt this procedure myself. (imac 24" 2.8ghz).
+
+
== Update ==
+
+
FYI - Here is a link to someone who claims that their 2008 imac was able to read a mini PCIe SATA SSD: http://forums.macrumors.com/showthread.php?t=1051241
this is a great questions... i have been trying to research this issues for a few hours now. so far i found two individuals who have said it is not possible. however, i intend to buy a mini pcie ssd card and attempt this procedure myself. (imac 24" 2.8ghz).