My apple pincushion was originally inspired by a pear pincushion (seen here: http://mypiccalilli.blogspot.com/2007/02/pear-shaped.html), so I decided to try my hand at making a pear pincushion, too. So, here's the pear pincushion tutorial: it's made in exactly the same way as the apple pincushion (instructions found here: http://uklassinus.blogspot.com/2007/11/apple-pin-cushion-tutorial.html) except that you omit the part about creating an indent in the top. The template for the pear:
Now, the apple is a more forgiving shape, as it appears more realistic if it's a little uneven. The above template was just quickly hand drawn with a dying pen around the paper template I had made to make my pear. I think that the pear turns out best when the template is symetrical, so it may be best to fold the template in half and trim off any uneven bits, so that both halves are the same - and then be careful to follow the lines when sewing it up.
PS. I've set up a flickr group for anyone who wants to post their version of anything on my blog at http://www.flickr.com/groups/lil_d/pool/. If you make one of these pincushions, please do post - I'd love to see how they turn out.