I cant work out a decent way to handle a high number of users with bitcoind - the problem im having is seeing what new transactions have come in.

listtransactions appears to be severely flawed - you have to walk backwards though the list (how do I avoid missing something if it can be re-organised at any time?).

List unspent is wallet wide, and it would only work if the entire transaction is cleared from the wallet after it comes in (i'm assuming change addresses would show up here after a transaction)

having one account for the entire site, with 24 hour throwaway deposit addresses could work (they'd only be polled waiting for incoming transactions for 24 hours) - but its not ideal for the user.

walletnotify might work. but its not supported by litecoind (yet?)

how does everyone else do it?