PS 6 & 7 brushes will work with Elements 2. A good place to start looking is Adobe Studio Exchange at <
http://share.studio.adobe.com/axBrowseProduct.asp?p=2>
Next, do a Google search for "photoshop brushes" and you’ll find dozens of other sites for free downloads. You’ll find custom shapes, gradients, filters, and other things to download, too.
Look for "photoshop presets" for terrific special effects for text, frames, photographic effects, etc. Most everything for PS 6 & 7 will work with PSE2 except Actions, and there are work-arounds for them.