The Central Ohio Day of .NET is 19 April, which isn't all that far away! If you've got a topic you're smart on, passionate about, or interested in, I encourage you to grab a submission form and toss your hat in the ring for one of the presentations.
If you're interested, but are holding back because you've not spoken before, then consider this: Code Camps / Days of .NET are a great venue for folks to get their feet wet. The crowd's friendly, the audience is interested in helping you succeed with your presentation, and you've got a bunch of other speakers who've been there and done that and are happy to share their experience with you.
What are you waiting for? Go and submit an idea!
(Feel free to contact me via the sidebar link if you need to bounce some ideas off someone or are looking for help/advice in writing up your abstract.)