I'll be in Carlsbad on Jan 1st and looking for someone to meet up with (incall or outcall) later that evening.  I've done a thorough search, but didn't come up with much in south O.C.  Any help or hints for a visitor from LA for a night? Thanks!

I'll be available...

In my experience and from what I see on the boards and in ads, most of the OC action seems to be centered around the South Coast Metro area (i.e. near the airport).

I can't vouch for this one, but she is reviewed here.  I think she's in the North County SD area.
http://eroticservices.cityvibe.com//index.php?do=view&p=94594