For a tabletop stand at uke meetings and at home, I have found this bamboo cookbook stand to be sturdy and capable of holding up the Daily Ukulele books : http://amzn.com/B002JM0RN2 . It folds flat and it's not too heavy to throw in a canvas grocery bag to take along to meetings.
That looks like it would hold an iPad nicely too - I use OnSong and am always trying to find a decent way to stand the device up in portrait mode.