3sila,
Congrats!

What language are the documents in? When I recieved Packet 3, it states that "all documents in a language different than English or Italian must be translated into English. The translations must include a signed declaration from the translator which affirms that the translator is competent."

I really do think that he can do his interview in Italian, they might ask how you two communicate if he dosen't speak English well, or something like that. I'm sure that everyone at the Consulate speaks fluent English and Italian. I think I've seen this case in other countries, and I THINK it was fine that they didnt speak English well, you might want to e-mail Naples, I've gotten e-mails back in less than a week sometimes!
IVNaples@state.gov is their e-mail address.

possibly required vaccinations:
-orecchioni (mumps?)
-morbillo (measles?)
-rosolia (rubella?)
-polio
-tetano (tetanus)
-difterite (diphtheria?)
-influenza
-epatite b (hepatitus

-varicella (chicken pox)
-influenza tipo b
-vaccino antipneumotocicco
Applicants should consult their family physicians for their "libretto di vaccinazione", and that only a doctor is able to determine which vaccinations of those listed are appropriate for a person depending on age, etc. Those who do not have their libretto can be obligated to be re-given these vaccinations. The cost will depend on the type of required vaccination as listed below:
costi amministrativi 15 euro
anatoxal (tetano, difterite) 10 euro
energix (epatite

24 euro
morupar (morbillo, orecchioni, rosolia) 20 euro
pneumo 23 (antipneumotocicco) 21 euro
difteral (dtp bambini) 7 euro
hiberix (Hib) 21 euro
varilrix (varicella) non disponsibile
imovax (polio) 10 euro
If your husband is between 18 and 64, it seems to me that according to this chart, he would only need to show proof of having been vaccinated for: Td (tetanus and diphtheria), MMR (combined measles, mumps and rubella) and Varicella (chicken pox).
Hope all this helps, don't forget to leave what you've learned for others!
EDITED TO ADD, I HAVE NO IDEA WHY SMILEYS ARE CLOSE TO THESE VACCINATIONS?!? I THINK IT'S THE B THAT TURNED INTO SUNGLASSES?"?! WHEN I TRY TO EDIT THEY DONT SHOW UP, SORRY.