Hello, I think this site is a great idea. I have created and contributed to entries, and perhaps I will even donate a little money.
This web page is a good resource to mine. It is registered foreign agents - it shows what law firms, PR companies, lobbyists and so forth are being hired by foreign governments to lobby, media blitz and go through legal hurdles to get what they want. I've drawn from the Colombian and Saudi Arabian ones so far. The link above is for the second half of 2002, you can see what law firms, PR companies and lobbyists were used in other half-years on the FARA web site as well.