The iOS beta board is a different board than the previous YM beta board. I'm not really sure where you are supposed to post your feedback at the moment. I'm guessing these new features were pushed server side to everyone who signed up for the beta. There will be a new beta version coming out soon, so there is a possibility that you could get an email for that and also access to the iOS beta board. I'll see if I can get some clarification and post back.
@MattSuda I'm looking for the beta forum also. Clicking the link for test flight just sends me in an infinite loop through the App Store though, like above, some new features have suddenly appeared within the app.
@MattSuda actually judging from some reviews left on the test flight app, I was able to determine my infinite loop problem could be solved by clicking the link from the Mail app instead of the Gmail app. This worked for me. Additionally, there is also a Send Feedback link this way. Please disregard my previous comment/question.