This is a copy of MAINTAINERS.txt -- from CVS: http://cvs.drupal.org/viewvc.py/drupal/drupal/MAINTAINERS.txt?view=markup
Feel free to edit. I've left comments turned on for meta discussion as well.
I didn't have anywhere else to post, consulting is about as logical as anywhere else.
CORE COMMITTERS
Leads
Dries Buytaert
Steven Wittens
Drupal 4.7
Gerhard Killesreiter
Drupal 5
Neil Drumm
Drupal 6
Gabor Hojtsy
CORE MODULES
BLOG API
James Walker
BOOK MODULE
Peter Wolanin
OPENID MODULE
James Walker
DRUPAL AUTHENTICATION MODULE
Moshe Weitzman
LOCALE MODULE
Gabor Hojtsy
LOGGING
Khalid Baheyeldin
PATH MODULE
Matt Westgate
STATISTICS MODULE
Jeremy Andrews
UPDATE MODULE
Derek Wright http://drupal.org/user/46549/contact
Earl Miles http://drupal.org/user/26979/contact
APIs, SYSTEMS, and DATABASES
POSTGRESQL
Sammy Spets
XML-RPC SERVER/CLIENT
John VanDyk
MENU SYSTEM
Károly Négyesi
Peter Wolanin (for 6.x and beyond)
FILTER SYSTEM
Steven Wittens
FORM SYSTEM
Károly Négyesi
Jeff Eaton
THEME SYSTEM
Earl Miles
Joon Park
NODE ACCESS CONTROL
Earl Miles
COORDINATORS AND PACKAGERS
DEBIAN PACKAGE
Hilko Bengen
DOCUMENTATION COORDINATOR
Steven Peck
SECURITY COORDINATOR
Heine Deelstra
TRANSLATIONS COORDINATOR
Gerhard Killesreiter
Gabor Hojtsy
Comments
batch API
I guess I (Yves Chedemois) should volunteer for the 'batch API' - partly integrates with FAPI, but I'm not sure Jeff and Karoly are willing to take that part.
files and uploads?
I'd be happy to step up for file.inc and upload.module. I worked on a few of the patches for D6 so I think I've got a reasonable understanding of them.