Is the litecoin development still active? I believe the lastest commit was like three months ago.
I'm working on getting the latest Bitcoin fixes into Litecoin. Stay tuned.
Coblee, since you're adding latest Bitcoin fixes, might be worth integrating the one which optimizes block propagation time.
I think it's called "signature verification cache" and was added into 0.6.3 by Gavin.
Maybe it's not critical for Litecoin now, but considering the higher block rate and how slowly people upgrade their clients,
it's likely that Litecoin will face this problem sooner than later, so better start preparing now!