In case you haven't heard, the sequel to Issues and PQL is currently in development: Issues 2! This Spirit of Half-Life powered modification was a large map-pack put together by some of the most talented mappers around. Linked by an ingenious Hub system, PQL and Issues featured some amazing maps (including some from our very own kol).
Firebinder has just publicly announced that Issues 2 is in the works. Currently, kol, Hugh, and most likely myself will be contributing to it. If you're interested, check out the site and see if you've got what it takes to put together a short set of singleplayer maps. Good luck!