Well said ced2, I recognise your session there!
One point that has not been made on this thread so far (as far as I can remember) is that shakey eggs seem to fit with some types of music (e.g. Latin, "world" etc.) much better than others (e. g. Irish trad.) It has always seemed to me that this is because they are usually played with a sort of off-beat that does not often fit well with traditional Irish/Scottish dance music. Any other opinions on this? As a mediocre fiddle player I have often been glad of a decent bodhran playing along but can find it difficult to keep time against an egg. (Before I am accused of prejudice against eggs, I will add that I have wielded one myself on occasion!)