The OWC Mercury Extreme 240GB SSD arrives tomorrow. Since I've been running a scratch disk folder on the Drobo I've accumulated 50GB in files. That's about a week of retouching (excluding actual image files). That folder on the Drobo shouldn't exist, it was created only because I didn't want to fragment my boot disk which is also an SSD. When I install the OWC 240GB tomorrow, I'll be moving the 50GB of scratch over to the new disk. I have yet to decide whether or not I should use the 240GB as scratch or boot though I have a feeling the speed might be better utilized as the scratch disk.
Can't wait to see how the new disk performs :)