You could certainly consider caching as an option. Take a look at W3 Total Cache and WP Super Cache for starters. If you have any questions or need help you should probably talk directly to the plugin authors or do a little Googling, as it is unfortunately beyond the scope of support for us to guide you through that.
If you’re interested in the beta that’s great – once again please email Rob using the above address and he’ll be happy to help.