I've put up another wiki page as a place to collect ideas for UIMA version 3.
It's a place to dream a bit. It goes with the earlier page, https://cwiki.apache.org/confluence/display/UIMA/Modernizing+the+internals+of+UIMA . Feel free to contribute, of course! The page is linked from the above page, but here's the direct link: https://cwiki.apache.org/confluence/display/UIMA/Ideas+for+UIMAJ+v3 -Marshall
