I like her hair and hope she doesn’t do anything drastic with it.
Belly: when Olivia asks Walter about Cortexiphan, he starts off on one of his nutty tangents “Oh that takes me back! Belly whipped up a peyote mash—” Belly is Walter’s nickname for Bell.
The Fringe Easter Eggs are all posted here:
http://eastereggs.fringetelevision.com/
Which includes the glyphs, Observer sightings, plus the next-episode hints and other things.
Speaking of the glyph code, the code for the second episode was “Breld.” What the hell is “Breld”? I can’t find any kind of references to it.