If you are looking for more hand positions I would recommend getting a set of Trekking bars. Nashbar, REI and few other places carry them. They are also called butterfly bars. I recently swapped out the straight bar on my everyday rider (old rigid mountain bike) and I could not be happier.

The bar weights less than the straight bar with bar ends on it and has WAY more comfortable places to grip.

When they go on sale you can pick them up for about $15.00. Nashbar cycles through 3 levels of pricing and last time I looked they were at the high point of $23 or so.
http://www.nashbar.com/profile.cfm?c...B%20Handlebars