Hi all. If anyone had the official deckbuilder for the game (LOTROTCG), I wrote a tool that reads the .ldc files it creates, to extract the cardnumbers used, so that might be another way for people to make decks.
I just tested it now, by loading up the TTT Theoden starter deck and then saving it again (the original decks had slightly different formatting, but resaving puts them in the right format) and then I uploaded it to my site. Here is the result:
http://www.gondorian.com/lotrtcg/ldc.php?ldc=gccgtestI believe the official deckbuilder was completely self-contained, so I could zip up my install directory and share with others, if you want.