with all the crappy wet and snowy weather my front wheel bearing decided to start groaning. if you have a groan an easy way to tell if its the bearing would be to drive straight then turn slightly to the right. then turn slightly to the left. if it increases and decreases in noise by turning its generally a wheel bearing. if i remember correctly if you turn right and it increases in noise than its the left bearing and vise versa.
Hot95 - alot of times balljoints or badly worn isos cause excessive squeeking over bumps or turning at slow speeds. id check out your balljoints or tie rod ends by the way you describe the sound. do u have to be moving for it to squeek(like turning the wheel while stationary)? best thing to do if you cant find out what it is would be to do a visual inspection of all the grease boots and all the bushings in the front end.