As it happens, I am looking for a core OOo/Libre Office developer. I am the Ubuntu Desktop Manager and I have a position open for someone looking to work on OOo/Libre. If you know someone who fits the bill, pass my info along to them!
There are several (paying) posts in the team mentioned being advertised at http://webapps.ubuntu.com/employment/ (one of which specifically mentions Open Office). They're in the 'Ubuntu platform' section.
Ah yes I see, that's nice. It's even available for remote workers. Thanks.