Wordpress features a pretty cool built in gallery feature that is easy  to use and even easier to enable. This feature automatically lays out a batch of images in a post, giving you control over their order, size, grid width and how the full size image is viewed.

I stumbled upon this feature while posting a batch of images on my subdomain. You can see an example post that uses the gallery feature here. To enable the gallery feature built into wordpress 2.5 and greater, simply include the  tag in your post.

This shortcode will place a gallery item in your wordpress post. You can either upload images into it, or use images you’ve already uploaded to fill your new gallery. Organizing the images is as simple as dragging and dropping them, or manually numbering them from 1 on.

At the bottom of your list of images is a breif options menu. From here you can edit the way your gallery looks and functions. Selecting an attachment page will point the user to a blog page with your single image featured as opposed to a direct link to the image. The rest of the  options are fairly straightforward and allow you to get your gallery displaying as you wish.

Details from the Wordpress codex canbe found here.