To improve page loads on MOSS site pages you can enable the blobcache to cache a number of file types of your portal into a cache directory specific for your MOSS site. This is really kewl for cutting down the load on the server. The blob cache is enabled from the web.config file for your web application directory [Virtual Directory] that is serving your moss site.
<BlobCache location="C:lobCache" path=".(gifjpgpngcssjs)$" maxSize="10" enabled="true" />