David, that is the same way things open in CS5 or other CS photoshops. you do the raw work in LR3, th en open with and it opens to CS5, then do a save as and it saves as TIFF.
The alternative way to access straight in Adobe is look up the file in the catalog manually outside LR3 by path, then you can edit RAW in CS5.
PRobably not applicable to what you said though, just info...
But maybe operating as a plug in is a little different. LR3 and CS5 work together, but it is not really a plugin relationship.
Guys all I can say is nicw photos, keep it rolling. l8er... Other than Dan, I felt same way about the sun/shade, country field shot of mine, I liked the tones and solar treatment of this one.