What Nicola is to software, Tommy is to hardware. When this project started the JP1 interface required good soldering skills and at least four hours of free time to put together, so Tommy decided to try and simplify it a bit. What he came up with was a design that called for 2 resistors and 1 diode and about 15 minutes of free time to build it. If Mark's IR.exe program made JP1 appealing to the masses, just imagine what Tommy's Simple Interface did for it.
And if that's not enough, Tommy has written up everything that he has done is documents that absolutely anybody can understand. He's also the author of the "JP1 For Beginners" document.