Sorry to drill that topic more, but since installation - few hours ago - enhanced-locksreen keep to be reported via Conky as most RAM hungry application on my N900, using 18.7 MB real RAM and 41 MB Virtual Memory at all. Is it supposed to be like that?

As for slow appearing of lockscreen, i don't encountered that. As for missed calls, haven't had a chance to test it myself, but many people reported it here.