My progress so far posted here http://forum.xda-developers.com/showthread.php?t=1490116:
If you want app data to be moved to external sd Link2Sd works but with a few extra steps only. Here is how I manage this on mine.
Installed Link2SD on tablet.
Formatted external card (in my case a 32GB microsd in an SD adapter) on my laptop using EASEUS to have to PRIMARY partitions 1st in FAT32 and second in EXT3 formats.
At first Link2SD does not recognise any ext partition present and if I try to recreate mounting script on it telling it EXT3 format it says something like could not do, directory does not exist or similar.
Then after a reboot Link2sd warning pops up saying the sd card was not mounted at boot and therefore the system did not load apps on it. You have an option to recreate a mounting script (which I did not need to do as did it already previously) and the quick reboot option (which is different from the regular reboot in the way that it only restarts the android interface not the whole hardware) - so I do this reboot and after everything starts you can see the extra partition and use it.
So currently quick reboot is needed after every total shutdown of the tablet - thankfully I almost never shut down the tablet completely unless run out of battery completely or some other rare reason or testing like this one.
Also note that quick reboot sometimes gives a close/wait warning just after it is done - I always chose wait and everything seemed ok after that.
Make sure you give Link2sd superuser permission. I decided to leave out Lib out of the app data I link because I noticed that if I move data back to internal storage link2SD shows that libs are unlinked already/ I know there is an option in link2sd to relink libs at boot but I was not able to confirm if it works and they tend to take little space internally anyway.
Regarding extra partition size I tried less than 1GB and ca 14Gb. With bigger than 1GB partition it seems to recognise its size in link2sd but once you move more than 1gb data to it does not reflect the increase above 1gb but still seems to make the apps I moved before and after that work still.
I wonder if multi mount widget could help when combined with link2SD somehow. My guess best solution would be to make android mount external card early in its boot.
Hope it helps