Basically what Wanna Be Foster is saying is to bump up an older thread.
To hopefully try to answer your question: I rushed Bee sometime over the summer. First they sell about 25 bleacher seats in the first couple of rows to anyone. It is a general rush. The tickets are either $20 or $25. After that they sell whatever they have left to students only for $25. I went around 11:30 am in August and missed the general rush and got student rush. So Bee rush is fairly easy - you'll most likely get a seat.
Keep in mind, though, that this is one of the busiest times of the year for Broadway - so busy that they raise their prices for this week. I attempted to rush this time of year a couple of years ago with no luck. It was crowded and the lines outside theaters were quite long. But I had gone to the box offices after 10 am. With that in mind, I would definitely get to the box office before 10 am. If you live near the city, try going in early. Show up at the box office around 8 am. If no one is there, walk around a bit and get some breakfast or something and keep checking back. Once people start getting in line, wait. Hope that helps and good luck!
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611