I took a look at IVA's most recent non-profit filing, which has info from 2007. I didn't have access to the info showing his donors, so I can't help there. But, here are a few tidbits. Nothing really surprising or notable, to my mind.
First, here's the income and expenses summary. Fischer is paying himself $47,750 a year.
IVA admits it lobbys.
If there's anything I quibble with, it's this. I think his daily internet screed proably is an effort to influence the general public, and block "e" should be marked yes instead of no. That would increase the amount he spends on lobbying by $1,500, which is what he spent on computer and internet expense. I don't think that increase would change his reporting or status.
The last line above says "see statement 7" for a description of his activities. Statement 7 below.