Nick, I also just received an Olympus SP. Gonna try shooting with it this weekend.
I did try shooting the same scene with and without Skylight 1B with Elitechrome 100 film; a slide film. Guess what, since I didn't take note which shot was done with/without the filter, when I had the film developed about 2 weeks later, I couldn't tell the difference!
If you buy a good 1B or UV filter, you don't need to worry about ghost image when pointing the lens towards the sun or other bright light source. Here's a few of (aestheticaly bad) shots with Hoya HMC 1B attached. The second photo was shot without any lenshood at all.