Does anybody know where could I find and electronic or pdf version of Forcellini’s Lexicon totius latinitatis?
TIA
There is a new Brepolis database called “Database of Latin Dictionaries”. They have the entire Du Cange. I do’t think I ever saw a digitized Forcellini. Let us know if you find it.
Good news indeed, because there are some volumes missing on the Gallica website !
You should stop by the Brepolis office and ask them if they would be kind enough to share the scans with us!
Good idea, but they would not do it for free, I guess… 
Willing to try a box of chocalates? 
I saw dead links to those now missing volumes on some site. It means that at one point they were there, but were later removed from Gallica. I once downloaded Maigne d’Arnis’ dictionary based on Du Cange. Now it is gone. Maybe someone somewhere has those Du Cange volumes…
.pdfs of the 1965 reprint are available at Documenta Catholica Omnia along with a lot else, including Du Cange’s Glossarium.
http://www.archive.org/details/totiuslatinitat00forcgoog
[This is a very old thread! // Veterrimum hoc filum!]
Ita intellego, sed perantiquissimus est hic liber!
With the completion of the Thesaurus Linguae Latinae still forty years away, the value of a complete Latin-Latin dictionary like Forcellini’s Totius Latinitas Lexicon has surely not diminished since 2006, and the usual sites where one goes to find .pdfs of such books aren’t helpful in this case: Gallica has only Tomus I, Google Books has copies but the last 350 pages of Tomus III are unusable, and the copy which archive.org claims to have turns out to be Smith’s A Dictionary of Greek and Roman Biography and Mythology.
EDIT: A two-volume edition, with the Italian translated into English, is available at archive.org: Volume 1, Volume 2.