Heres some suggestions...
Certifications
There should be a very simple breakdown of every certification that you can get here. For example, if you purchase the "Finders Fee" book you can get a certificate of completion issued in Advanced Missing Persons Specialties. If you do a anti-piracy case you can get certified as a Anti-Piracy Specialist. Take this test and get certified in this....
Someone new like me wants every certificate I can get and as much knowledge as possible. Not only does it look great on a resume but also on my website
Logo
Every member should have access to be able to download the IPIU logo for there website, fax cover sheet, letterhead etc. It should be a free download. Without being a paid member they do not have access to download the file. If they leave the site then they must remove the logo. Simple. It is great ( GREAT ) publicity for IPIU.
Store
So Im a bit crazy, but there should be a IPIU store for coffee mugs, t-shirts, polo shirts, mouse pads etc. Without getting crazy and having to worry about merchant accts, shipping etc., set up a simple Cafe Press store. It would take me, or you, 15 minutes to set up and I can guarantee you with 1 hour you would have a sale. Not only could IPIU make a ton of money but if you set up an affiliate program then all IPIU members could also promote the store and make a small percentage. With 40,000 + members there is huge potential there ; )
Simplify
I have been doing internet marketing and building websites for over 10 years. One rule I have is to make every website "stupid-proof". You need to make it very very simple. The way it is set up now is very confusing and extremely overwhelming. Too much information in each post with too many links pointing all over.
Thats all I have for now ; )