I had commented on Skritter's board with regard to joint display of Pleco and Skritter simultaneously on iPad. (How I did it can be found at
http://goo.gl/4BYVf)
In general, I had always hoped that when the iPad came out that there would ultimately be ability to display flashcards on the right (or left) and having a dictionary or document search lookup on the other side.
I see value in following Display/Feed configurations.
1) Source > Target
ictionary
2) Source > Target:Reader
3) Source > Target
ictionary Reader + Jukuu Lookup, etc., maybe via tabbed configuration.
Source could be Flashcards, Reader (web or document), or some other feed like voice, movie subtitles, news, etc.
And I brought up in the past that Source and Target also do not necessarily need to be the same device. So, for example, a flashcard session on an iPhone can update the reader on the iPad. But I also believe there were technical challenges associated with bluetooth with regard to reliability, but maybe the new bluetooth standard would simplify it. Maybe WiFi would work, as long as there was not more than a few second delay.