glep Gentoo Linux Enhancement Proposals 2007-04-01 Grant Goodyear The GLEP project manages Gentoo Linux Enhancement Proposals. The GLEP project solicits, collects, maintains, and shepherds proposals for substantially enhancing Gentoo Linux. Any user or developer may construct and submit a GLEP for consideration by the GLEP editors. Because GLEPs are kept in CVS, GLEPs constitute a permanent record of proposals designed to enhance Gentoo Linux.

For more information, see GLEP 1 and GLEP 2. g2boojum liquidx Files and tools in CVS List of Gentoo Linux Enhancement Proposals
Implemented Gleps (Final)
Accepted but not implemented gleps (Accepted)
Draft Gleps (Drafts)
Deferred, Rejected, Withdrawn, or Moribund Gleps
Notes
GLEP types: I = Informational, S = Standard
GLEP Statuses: D = Draft, d = Deferred, A = Accepted, F = Final, R = Rejected, W = Withdrawn, M = Moribund

If you want to roll your own proposal, you'll want to look at the files here.