I did a little bit of research and found a few ways to add a search function to the site for free. So now I'm messing around with that and trying to get a search bar up and working. My first attempt is going to be with a Google custom search bar, something I used at the old site. I think it's up and working now and you can find it over there in the right sidebar. At the moment, Google should be in the process of indexing the site and, once that's done, we should get search results on a separate page here at the site. That's the plan.
If that works, great. If not, I have a plan B. I always have a plan B. You can't get through life without a plan B. But let's give Google a chance to index the site and see what happens.
And, yes, I know the search bar is kind of tiny but it has to fit in the sidebar. Plan B is actually a bit more aesthetically pleasing but it involves creating a separate page that you would have to visit to search the site. Having the search bar on the home page is much more convenient for everybody and I'm going to try and make it work.
Update: I've fiddled around with this some more and it appears that everything is working. Give it a try and let me know if you have any problems.