I hope I didn't sound sarcastic or anything like 
that, but it's good information to know in case 
you talk about this film in the future with 
someone who would REALLY act snobby about their 
knowledge of Studio Ghibli films (there are 
plenty of anime elitists out there who just 
irritate me).

A good info source about Hotaru no Haka and other 
Ghilbli films can be found here:

http://www.nausicaa.net/miyazaki/films/

Oh yeah, the cels:

Anime Cellar

Besides the Ghibli reproductions, I don't think 
that they ever got any new cels for the past year 
or longer...