It would be nice to see some audio enhancers or support for enhancers built into ShoutIRC.

Even better would be VST support, but that might be a little more difficult.

Some of the audio enhancers I am looking at are:
Stereo Widening
Multiband Compression
Bass Boost (With controllable gain/freq)
10-band EQ
Limiter

It may seem like a lot, but it would definately make this product more appealing to the professional market.

I wouldn't expect implementation overnight, rather, I wouldn't expect anything until version 6 or 7. But it would help a lot.

AutoDJ does support DSP plugins, it's just a matter of them being written (or ported from existing software).

Currently the only one I've ported is a normalizer plugin.

Pray tell, how would one port a DSP?

It just has to be modified to use the AutoDJ DSP interface (see attached file).
If you see a plugin somewhere that is open source I can try to modify it for you.

One last thing: VST support?

VST support probably won't happen because a big part of the VST spec is GUI integration, since the bot is a console app it has no GUI and wouldn't be able to display the VST controls.
Also they want money to license the technology.

Winamp DSP plugins might be an option on Windows, but it would be on a case by case basis if they work depending on how much of the Winamp API they use.

Found usable source code for a DSP: viewtopic.php?f=3&t=671&p=2678#p2678

Update:

I have created an AGC system in Liquidsoap. If anyone is interested in it, let me know in PM.
It uses a decent amount of LADSPA plugins, and requires a bit of CPU.
(Our stream sounds tons better already)