FlowChat does not currently implement a friendly channel listing function. Listing channels is still possible, however.

1) Type /list and hit Send in any channel on the network you want the channel listing for
2) Go back to the Servers tab (the screen you see when you first start FlowChat)
3) Tap the server that you typed /list for (eg., if you typed /list in the default #flowchat channel, you would tap Brancipater Software)
4) In the view that slides up, tap the Console button

The channel listing will be in raw (but easily readable) format in the console. 

··· A user-friendly version of the channel list is going to be implement in the next point release, version 1.1