not sure whether it's out yet, as you only asked for i-RAM and not i-RAM 2:
Gigabyte's i-RAM 2
(you've got to scroll down to the lower part)
"The iRAM is one of the most interesting product that Gigabyte has developed this year. Gigabyte for the first time has unveiled the specifications of their upcoming iRAM 2 in this presentation so listen carefully.
The i-RAM 2 will be using DDR2 memories instead of DDR1 and the data transfer interface is SATA 3Gb/s double of the current SATA 1.5 Gb/s. It will be externally housed with by means of an external case or fitted into the 5.25" bay with eSATA interfaces.
The number of memory slots are expected to double to 8 and you can have up to 16GB max memory. There won't be performance improvements moving from DDR1 to DDR2 since the speed is set at 66MHz but DDR2 generally costs lower than DDR1 so it makes sense to push out i-RAM 2 on DDR2 now.
The expected announcement of i-RAM 2 is targeted for February next year."
but for most cases the first version of i-RAM is already sufficient. you can still ask the shop Max has suggested. they might be able to get the new version as well, if it has been released already.