He's trying to be the source of the stream (Be A Dj on the shoutcast page) which uses a dll that winamp routes incoming signals to, rather than just listen to shoutcasts.
First off, how the shoutcast plugin works depends on which version you use, but they all 'see' the audio input that you set as the Windows default recording input, in your Sounds & Audio Devices control panel under the 'Audio' tab. You probably figured this out already but though I'd be explicit.
Secondly, what version of Scope are you running? I have better luck with the 4.x drivers (some even say the 4.5 driver). You don't have to pay anything to use the upgraded Scope versions, you just don't get the additional plugin bundles.
Now, you say with the 'highest' buffer setting, do you mean the 'Output Preload' slider? I have found this helps shoutcast a great deal (3/4 of the way to the right was good for me). Even with the Output Preload slider turned up I'd probably go a bit higher than 13ms ULLI if I was having problems with using the WAV driver. If you haven't played with the Output Preload slider then I highly recommend you do, as this generally solves most issues with the WAV drivers in Scope.
And of course make sure you have a copy of the LAME dll if you're using that as your encoder source.
In regards to 2nd Life, I happen to have an old SBlive in my system for games & general 'windows' crap (better than AC97 onboard audio as that consumes a ton of cpu). I use the KX Project drivers with it, as they allow a great degree of flexibility for a card that can be found for $10 these days. The only real drawback to these cards (for non-audio work) is that all sound passing through them is resampled from whatever samplerate the source is (typically 44.1khz) to 48khz, as there is only a single clockrate in the cards. I find that longterm listening of music through this thing is very fatigueing, while my RME & SCope cards are not. But for a 30 min UT session it works great.
An interesting side note, as of my most recent XP reinstall if I attempt to use the SBLive as a Mic input in my games I get a total system freeze. NO bsod, no anything. And nothing has changed slots inside the PC at all, the only difference is that XP's ACPI support has reshuffled everything. It definately worked before, but now I use a different recording input with a Shure hanging from a boom, which is overkill for a game.
