Certainly looks like a Jade Plant ([*Crassula ovata*][1])

I'm not the best at taking care of the things, despite having a certain fondness for them (the college greenhouse I'd visit to get out of the winter blahs had a specimen in a not terribly large pot (25l, perhaps) with two trunks about the size of a human thigh.) 

Mine seem more prone to drooping than to maintaining that nice upright tree-like growth.

The yellowing may be from too much light - a shadier spot might suit it better.


  [1]: http://en.wikipedia.org/wiki/Crassula_ovata