BioPerl is a volunteer project currently supported by donated time. The hardware, bandwidth, and server support is all provided through volunteers and donations. (more details here, to be written by ChrisD).
If you are interested in supporting BioPerl by volunteering your time, please join the Mailing lists and introduce yourself and what you are interested in working on.
Those interested in supporting BioPerl financially please contact the Open Bioinformatics Foundation.