Hopefully someone has a quick and easy answer for me.. I'm well versed in using Poser to create stills, but I need help with animations!  I'm using Poser Pro 2010.  The problem I keep encountering is I don't know how to lock limbs in place for X frames, then unlock them, so now the limb slooooooooooooooooooooowly moves to the position at the end of the animation starting at the very beginning.  For example, say I wanted to make a simple animation where someone raises their hand and waves, then raises their second hand and waves later in the animation. Now, they'll start raising both hands at the same time, but the first one will move way faster as the second one creeps to its position in the keyframes.

I'd appreciate help!

Open the animation panel and notice the keyframes for your animation.  You have some buttons in the upper right part of the keyframes tab in that panel for changing the type of transition that is calculated between keyframes.  Default is spline and there is always a keyframe at frame 1 by default, so if you add a keyframe later on, you get this transition between frame 1 and the new keyframe.  If you want to keep the hand still for this time, you can change the transition between keyframes to constant instead of spline.  What you often have to do is copy the keyframe from the start of the still period to the end of the still period and then set the transition between them to constant.

From the setup you just described, do this:  Open the Animation Palette (Windows-> Animations Palette).   For the second hand, go to the frame where it currently starts moving and set a key frame ("+" button).  Now click on the gray button with a straight line in between the buttons with curvy lines.  The timeline should turn gray, indicating that the hand position will be constant, i.e. "locked".  Now select the key frame you just created and copy it (Ctrl+C).  Now go to the frame where you want the second hand to start moving and paste (Ctrl+V) the keyframe you just copied onto that frame.  Now at the frame where you pasted, click on the brown or green button to the left of the gray button with the straight line.  Now you have moved the point where the second hand starts to move further down the timeline.

you need to add a few more keyframes.   you can change the interpolation type, but adding in some more keyframes  is an answer. you can also add keyframes to do an ease-in ease-out  motion where the arm moves slowly at the start and end but accellerates during the movement.

Any tutorial on keyframe animation will work for poser.