Possible to receive from pop3 with movemail asynchronously?

[Michael Ekstrand]

I've got Gnus set up to retrieve my mail from a pop3 server using
movemail (from mailutils, for TLS support).  I'm doing this with a pop
mail source and :program.

Is there a way I can have Gnus run the movemail process
asynchronously?  The SSL setup time on my school's server is quite
long, and Emacs is unresponsive while movemail is running.  It'd be
nice to be able to hit 'g' and then go edit some other file while Gnus
gets my mail.

Thanks,
- Michael

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