They've rebranded under the name Bixin (
www.bixin.com)
They're a wallet / mining company now - supposedly their wallet app is supposed to be quite good
I'm not sure if this is still their most recent thread though...
Question: Does anyone know if they're still providing interest on wallet balances?
Yes, they still pay out interest at the beginning of each month, although the % has decreased steadily. It's not much, but I like to think of it as a small sum to offset the transaction costs when I spend my coins.
Only reason I joined haoBTC/Bixin is because of the interest - that and the very good forum thread on Eric's 6 month stay at the mine.
If interest is removed altogether then I'd probably move my wallet balance back out to the external bitcoin client. But I've been with haoBTC/Bixin for more than a year now, so far, so good!