I'm thinking they(Rick and Karl), or their assistant Danielle, or whoever, checks this thread often. A couple days back in reply to a conversation here regarding a track called
All These Things appeared on the home page.
Regarding the webcast, there was a cryptic myspace group message that went out stating the following:
in progress
Listen to Dirtyradio!!!
If the above link does not automatically start your default music program please run your music program and use its "play location/url" feature to enter the following address: http://ct1.fast-serv.com:9486
new stuff ? old stuff ? unreleased stuff... 
The message was sent at 11:59am PST Wednesday, April 26th. Unfortunately I was unable to listen in as I had a meeting to attend to 12:10. But then I noticed no real word or conversation here on the site so I figured it slipped underneath the radar or there was no new material played.
Either way, it's been far to long since good groovy vibes have been heard from the world of lemon broadcast over the lines.
In light of this discussion I played the last webcast broadcast at the theater pub I work at last night. It was nice to listen to on a loud system.