Free for registering now:
AstrologicalDates.com (what's your sign?)
ChineseGirlsDating.com (have a niche)
CollegeSinglesDating.com (have another one)
DateByWebcam.com (kill 2 with 1)
DaterBook.com
DateGuides.com (how-to, tips, yes signals)
DatePrograms.com (compare, review)
IODating.com (brandable)
more at
http://www.exxxpired.com/ but of course the best names are in the vip email list