I would love to see more seiyuu guests, though I figure they may be difficult to book.
If possible though, here are some suggestions:
Toshiki Masuda
M.A.O (also in toku)
Tomokazu Sugita
Miyuki Sawashiro
And some other guest ideas:
Dan Green
Sean Schemmel
Eric Stuart
Chris Sabat
Crispin Freeman (it would be great if he could give some of his lectures)
If possible though, here are some suggestions:
Toshiki Masuda
M.A.O (also in toku)
Tomokazu Sugita
Miyuki Sawashiro
And some other guest ideas:
Dan Green
Sean Schemmel
Eric Stuart
Chris Sabat
Crispin Freeman (it would be great if he could give some of his lectures)