Curtis, InDesign CS3 got, uh, Snow-blind in 10.6, and can only see profiles in the Adobe profiles folder. Copy or alias your profiles here, and you should see them in ID: HD/Library/Application Support/Adobe/Color/Profiles/
John, you can access all the Advanced settings if you click the triangle, then select a different radio button, then reselect Color Controls.
My earlier tests were off on a couple of things. First, 10.5.8 does work as expected (Photoshop good, ID too dark). I must've messed up my settings on the first try. D'oh!
In 10.6 with a fresh 2200 driver install (11832.dmg, then 13044.dmg from Epson's site; driver shows as version 3.03), ID and PS are nearly identical, and similar to ID in 10.5, but a touch more saturated (better).
In each case, I am using the standard printing procedure:
Photoshop/InDesign manages colors
Printer Profile: SP2200 Enhanced Matte_MK (I'm using matte black)
Intent: Relative Colorimetric (what I've historically chosen, and used for all in this test)
Print driver:
Paper: Enhanced Matte, 720 dpi (saving ink; it's close enough)
Color Management: No Color Adjustment
I also generally do -20 ink (again, consistent for all tests)
The 10.6 prints are darker than the 10.5.x, but color is about right. Nothing a custom profile could not compensate for. But what if Apple/Epson "fix" the issue in 10.6.1? Aaaargh!
Finally, yesterday I got all clever and copied the 3.09 plugin from the 10.5.8 disk into 10.6, but no changes. It works and shows up as version 3.09, but that's it.
My system is a straight upgrade from 10.5.8, not a fresh install, and CS3 is also an existing install, fully updated.