In the community there are some ISPs that have LIR status. They may offer services as LIR to other DIY-ISps. An incomplete list:

• FunkFeuer (Austria)
• guifi.net (Spain)
• gitoyen (France)
• tetaneutral.net (France)
• Freifunk Rheinland (Germany)
• In-Ulm (Germany)
• Openfactory (Switzerland, Serbia)

• Role of IANA, the different RIR, LIR
• How to get an AS number?
• How to get IP (v4/v6) ranges?
• Does becoming LIR brings any advantage? How much does it cost?
• Difference between PI and PA allocation

There might already be some good explanations out there, we might not need to reinvent the wheel.