http://mw.lojban.org/extensions/ilmentufa/mahantufa/ircitufa.html
This is the tool where you can insert your PEG, compile it online and test it.
I already created a copy of it for xorxes so he can continue working with his own copy, not with this one.
For all the others please be polite and if you ruin the grammar with your modifications please use Ctrl+Z to restore the initial grammar and then compile it to save the initial state to the server.
A user-based approach would be nice of course but first we need to think how to implement that.