Hi Jeff, nice to hear from another fan of the glorious world of silent films. I suspect you won't have reason to check back for and answer, as the silent film forum doesn't have the same level of traffic as in the past. The answer to your question is, unfortunately, the website doesn't support the search capabilities you and many of us would hope for, allowing us to focus on silent films. For the present, the best means of uncovering a film that might be new to you is, as you said, searching the schedule a week or so in advance. Best wishes and hoping all your silent dreams come true.
Wouldn't it be nice if there was a section where they would announce when/what silents would be shown? It can be difficult to look through the full schedule without accidently missing one; I used to only look for them on the Sunday schedule because of Silent Sunday, but I've seen them also played on week days, so now I look at the full week schedule. It would be so much easier if there was a space just for silent film announcements. Its great to see that there are still some folks who appreciate the silents here on TCM, I've read many great posts by silent film fans, what are some of your favorite silent gems?