Somebody is going to take the piss of me somewhere with what I am about to say, but stay with me.
But I have to say having heard Dido's "Stoned" (from "Life for Rent") it reminded me of all that late-80s synth, just before acid dance took off and the rest. You know the type I mean Pet Shop Boys a la Domino Dancing, Depeche Mode's Master & Servant, etc.
I have to say it is nothing like Dido has ever done (discounting her work with Faithless and Eminem). Big on synths with enough layers of swathing electro-pop to suffocate Neil Tennant's hamster.
What has this to do with NO? Quite simply NO spawned all this, whether we like it or not.
Okay you're probably pissing now (I don't give a fook), if you've heard it you'll know what I mean, if you haven't and you're laughing, FOOK OFF! 
So what was NO's last great synth track, before dance/house took over; ie, everything from Republic onwards?
For me it was Round & Round. Oh, and how can I forget WiM?!
Maybe the last 'proper' synth (not dance) track they did was Vicious Streak. Certainly none on WFTSC, unless you count Krafty.