I am happy to join the community as contributor as number 1 in 2007 ! Indeed, it was a new year resolution to make sure that I get Adempiere up & running for this year.
As a contribution, I am documenting all relevant progress along the implementation through my "reality show" blog on 
However, all structured documents I produce will be displayed in the wiki. I hope you find them useful.
My roadmap for Adempiere is:
1-) Animate the Adempiere reaility show ; 2-) Produce "step-by-step" style tutorials for:
2.a- How to customize Invoice Layout within Adempiere; 2.b- How to modelize Consultancy company Business Casein Adempiere (basic example);
3-) Review other tutorials and documents and complete them;
You can reach me on:
hakem.taourchi (at) jadanet.net