. Down to 2 slots.
Elizabeth Mattijsen* has dreamt up, funded, and organized (with Wendy van Dijk) a free 2 day workshop to get 12 participants up to speed on hacking the Perl 6 Rakudo and NQP compiler toolchain. The latest I have seen is that there are 4 slots left. If you are the right person for a slot, do not let expenses put you off.
* Elizabeth Mattijsen (and Wendy van Dijk) dreamt up, funded, and hosted the Perl Reunification Summit in Perl (yes, there's a city called Perl) in 2012 to bring Perl 5 and Perl 6 contributors together. lizmat has also been landing increasingly important commits near daily over the last 3 months (hundreds per month).