Apparently, misery DOES love company.
Cyc,
Based on what I understand about how this stuff works it looks like whenever the cops have "taken money" from someone, or money is seized in any sort of drug bust, etc. is considered forfeited, and in some instances the currency becomes evidence. I was told the reason for this is because they have to "operate under the assumption" that the money was obtained as a result of illegal activity. Whether or not that's actually true, I don't know. I'm well aware of corruption on the local law enforcement level in a FEW locations. While I'm aware of individuals who have received property which was seized in raids, after they were found innocent or acquitted, I've never heard of anyone getting money back.

I suppose it happens, but it's probably not common.
On a side note, I do know of at least one case in particular where an evidence file as thick as a Sunday newspaper contained nothing but photocopies of "marked bills" which were exchanged with an individual by a confidential informant. I mention this, because I think that they sometimes take money from people to see if they've been interacting with their informants. Not many people look at their money very carefully when they're "taking care of business."
Lastly, I'd like to take the time to thank you for putting that assumption of the OP's in check, Cyc. I'm sure there are plenty of solid motherfuckers out there who don't believe in doing the cops dirty work for them. Without becoming overly passionate here, I'm going to say this: The ripple effect of snitching is considerably larger than that of just doing your own time. I don't think people give much thought to that, but it really is something to think about.
Also, where there's a will, there's a way. Getting busted and doing some time isn't the end of the world. There's so many opportunities to get offenses removed from your record these days that you could quietly have your file sealed, and move on like nothing ever happened. This works, I know it does. I've seen it in action. I know people who have been pardoned, I know people who have petitioned to get their convictions reduced to misdemeanors and their rights "restored." It happens, but you've got to be willing to take that extra step and do the homework and make it happen for yourself - the same way you stuck your neck out and got popped. Taking the easy way out of a bad situation might be what works best for some, but really, there just are no shortcuts in life when it comes to shit like this.
[This part must be edited; remember, judgmental posts are not allowed in the Legal Discussion forum. Thanks, Johnny1]