Using the iPad to broadcast online radio

Hello all. I am just curious as to what people are using to do online radio broadcasts from an iPad. I took a look at Backpack Studio, and there is a lot to like there. However, it seems to me that that is meant more for podcasting, and that streaming is just a secondary add on. I like the accessible nature of it, but don’t know if it is what will best meet my needs. That app seems to be most suited to recording a podcast. I am also on the lookout for a good audio editor for iPad, but I want to keep those separate.
So, the idea is to be able to broadcast my church services to my station. So, a basic app, with a few pads like on Backpack studio, and the ability to receive signal from a usb audio interface, and put that out to an ice cast server, and I’m good to go.
Apart from Backpack studio, what other apps work well?