We are a small group of people spread around several continents, working to advance different aspects of the project and discussing the design of the network.

Admin Project Manager jrandom point of contact of last resort
Treasurer wilde manage donations / accounts / bounties
Operations Manager duck monitor network health
User Advocate protocol gather, prioritize, advocate for user needs

Dev Core Lead jrandom lead dev for the SDK and router
I2PTunnel Lead mihi lead dev for the I2PTunnel apps
Integration Lead human lead dev for integration with other apps and networks
Contributors thecrypto encryption and signature routines, I2PIM
eco i2psnark - bittorrent over I2P
shendaras general help
FillaMent i2pmole - I2PTunnel management console
MrEcho naming service
wiht naming service
ugha helping with c tuning
[vacant] Help needed on many fronts!

QA QA Lead [vacant] develop test plans, manage bugs, coordinate contributors
QA Dev [vacant] automate unit and functional tests
QA Contributors baffled router stress testing, bug reporting
ugha router stress testing, bug reporting
JAnonymous router stress testing, bug reporting
jar router stress testing, bug reporting
Masterboy router stress testing, bug reporting
[vacant] router stress testing, bug reporting

Web Webmaster [vacant] manage web issues re: hosting, programming, etc
Web Editor [vacant] coordinate docs: whats needed, how its organized, who is working on what
Web Designer [anon] [working on graphics, stylesheets, layout]
Web Authors JAnonymous getting started docs, wiki migration
ugha wiki migration, doc cleanup
duck howtos
jrandom overview docs, tech docs
jar translations into French
[vacant] help with intro docs, walkthroughs, howtos, and explanatory materials needed!

We are very open to other developers who want to get involved and anyone else who would like to contribute in other ways, such as critiques, peer review, testing, writing I2P enabled applications, or documentation. Almost everything is written in Java (1.3+), though some third party applications are being written in Python and C. The code currently works on Kaffe, and GCJ support is slated for the 1.1 release.