Congratulations! It's a big step to put yourself out there for review ;) Your site looks nice and clean. These don't all happen at once, but here are some bits to think about:
- Look into adding transcripts (you will get lots of traffic from google)
- Add RSS feed + iTunes feed (www.apple.com/itunes/podcasts/specs.html)
- Add "feedback" tab at the top where people can get in touch
- Use that feedback to develop your product
- Have a marketing plan! How to get new customers and keep them.
- Have a way to generate episode ideas people are looking for (ask them)
- Create an intro with your name+email (if downloaded you want branding)
- Try trello.com for developing episode ideas (create lists/add nodes, etc)