I guess Crucial also sells SSDs and Apple sells new MBPs with 16GB RAM :) - but at this juncture I hate to spend money on anything when the other supposedly more bloated OS named Win 7 works just great with 3GB - that seriously ought to be more than enough for browsing, email and occassional Word/PPT stuff.
As for the swappiness - it seems to be at least somewhat better than Lion - hasn't used up swap after 20 minutes of doing normal stuff. But the Apple ID/Password annoyance is still there - I still had to enter Apple ID / password several times during and after the installation! The last time hopefully was for iTunes. Why can't they use one single sign on?