Just a quick note on the contention regarding whether or not "Initiative" means "Initiative as defined on p159" or "Initiative attribute and initiative score, or something else or inbetween";
Could it be that the developers, when writing the entry for Wired Reflexes and similar gear, chose to word "initiative" because the effects of Wired Reflexes adds to BOTH the Initiative Attribute (through the increased Reaction) AND the Initiative Score (by adding Rd6 to the roll)? If so, could this explain why Reaction Enhancers specifically state that it is incompatible with "all other enhancements to Reaction, including wired reflexes" [unless wireless enabled).
In a similar vein, Cram and Jazz both affect the Initiative Attribute by adding +1 REA, while also enhancing the Initiative Score by adding +1 and +2d6 respectively; contrary to these, Kamikaze only adds +2d6 to the Initiative Score, and so would seemingly be compatible with Reaction Enhancers given the RAW reading of both. Novacoke and Psyche, on the other hand, only affect Initiative Attribute by enhancing Intuition, and so again would likely be compatible with Reaction Enhancers specifically.
Personally, I think it would be beneficial to take a look at the effects of the 'ware, magic, and drugs discussed so far, rather than get further bogged down in semantics. Ultimately, we won't know for sure until official rulings are given, but if y'all want to argue till you're blue in the fac... erm, fingers... go right on ahead
[EDIT]:
Looking at other pieces of augmentation, at least, it seems to me that the RAI is to exclude augmentations from interacting with each other, as per Muscle Replacements:
" It cannot be combined with other
augmentations to the muscles, including muscle augmentation or muscle toner bioware"
Again, the effects are incompatible with each other, and the fluff text doesn't seem to matter much. It's this inconsistency in terminology that certainly breeds the kind of dissenting opinions evident in this thread, so it would be HUGELY beneficial to get a word from the Devs on what their intent was. *cough* HINT! *coughs* Oh, I'm sorry, excuse me.