Thanks for the great deal! I didn't need another dictionary, but was happy to get the two encyclopedias. Now I need a bigger CF card for the full Wikipedia database!
Lexionary is really just a PPC face on (appparently a subset of) the free Princeton WordNet 2.0 database. There's a free alternative that preserves all the capability of the desktop/web version of WordNet 2.1.
WordNetCE even uses the full WordNet database set, which does take up a lot of space. After playing with Lexionary for a while, I find it more confusing than WNCE. It does require a lot less room, though, which probably means that they use a subset of the original database. Limited testing seems to bear that out.
That said, the price is still great for just the two encyclopedias.