jess: It is NOT open source. I suggest you go back and look up 'open source' again (try [link]). Opening sentence: Open source doesn't just mean access to the source code.
You absolutely cannot, regardless of contractual issues, distribute any RISC OS component commercially without a license - this is a point upon which all RISC OS-related companies are agreed.
With reference to the porting efforts here, any system would therefore need a commercial license to distribute any system with an OS on it.
This contravenes any acceptable definition of 'Open Source' regardless of the precise licensing position between ROOL/ROL/et al; to use the term 'open source' as people sometimes have done (notably not ROOL members) is therefore misleading.