Sure there is.
In the ACP (vBulletin Options - > vBShout Options) you can specify what usergroups can NOT use the shoutbox (Banned Usergroups). I guess the "Guests" usergroup (mostly usergroupID = 1) is also included in that field. Just remove that group and your guests can use the box.

There are no usergroup ID's showing in that box though.

Installed, works flawlessly, but have not released it beyond admin level.

Hesitant due to lack of word filter control.

A quote from one of our members on our board:

I also had a "low memory" message on my machine (running a gig of ram) after having the shoutbox open for a while but I just dismissed it and didn't think any further about it.

Is anyone else seeing this or have I done something wrong in my install?

Guess there isn't a way to give the members their own default colors/font, huh.... I would like it to be so they chose their own colors and it holds that for them instead of having to redo the color every time they wish to use it.

Is there a way to do that?

I have installed the shoutbox but i keep getting this error:

PHP has encountered an Access Violation at 77F48A3C.

Any ideas?

Thanks in advance.

Where is coding to make the "Shoutbox" header go from CENTER align to LEFT align? The CENTER align throws off my entire page.

That one is easy.
Go to your AdminCP and go to Edit Templates.
Open the Forumhome templates and then edit the forumhome_vbshout template.
The first table you see has "align=center". Change that to right or left and you're fine :)

The rest of these questions I can't answer. I'm not a coder and not the author of this hack ;)

Warning: Invalid argument supplied for foreach() in /vbshout.php on line 288

Any ideas?

Was he a firefox user?

Firefox suffers from a bad memory leak in 1.5 and activity increases it faster, especially on a 10 second loop like this shoutbox is.