just stay on v42 if you don't want further kernel enhancements badly enough to put up with a few seconds delay on boot. I haven't dual-booted my phone at all yet as I am very happy with maemo and I don't want to waste time potentially having to reflash my phone (due to WIP software) as it's an essential 24x7 comms device for me. however that doesn't mean that I won't eventually want to dual-boot at some future time when the process is seamless and stable and I still have a useable phone in the other OS - so I for one understand the point of uboot and appreciate the work that's ongoing.