Forgive me for being so blunt, but the name yumbunny is way to creepy and awkward for a dating website. I think it a catchy name that could definitely work for something else.
But the second I loaded the page and saw that guy looking down lasciviously at that way to eager girl, the name became way too much.
yum...bunny. Bunnies are an awful lot like cats (you follow). I just showed this to my roommate's girlfriend; she said, "ew".
A dating website's biggest challenge branding. I am pretty impressed with the branding on downtoearth.com. I think you will be much more successful if you can tone down the creepiness to a basal level like match.com or better achieve negative creepiness like downtoearth.com.
I'm sorry I am not offering other suggestions. If I think of any today, I will post them.