Tonight on Channel 4, a new music series begins with a fantastic premise. A group of music obsessives drive around the USA in a London black cab, finding interesting musicians and recording them performing and talking in the back of the cab. Sounds a little bit like the 2008 Stephen Fry in America series, doesn't it? Well maybe, except Black Cab Sessions has been broadcast online since 2007.

Watch the Black Cab Sessions trailer:

I first heard Zed Bias's Biasonic Hot Sauce – Birth of the Nanocloud last autumn. He may have been one of the key players in the London-centric sound of UK garage, but he was never of that scene. Based in Milton Keynes through the first phase of his career, he releases through a Brighton label and is now resident in Manchester.

I've seen some genre intersections in my time, but gangsta ambient takes the biscuit. Baghdad born South Londoner VersA Beatz began as a grime producer, but like many has moved from that genre's hyped-up energy into the slower, more menacing electronic “trap beats” of hip hop.

It's become a fairly common trope for herbally enhanced rappers to hype up their individuality by referring to themselves as an “alien”, but with Wiley you could believe it. In “Can I Get a Taxi”, the odd extended skit that forms the centrepiece of this album, he inhabits various London archetypes – the yardie, the cockney wideboy, the posh bloke – but while his accents are hilarious, it all feels strange, curious, like a child poking at creatures in a rockpool, and his ever-wayward stream of thought keeps veering off course.

Against all the odds, I find myself going into 2012 with a strong sense of optimism. And the reason? I am a born-again rave zealot. I saw it at Outlook Festival in Croatia, I saw it at Sónar in Barcelona, and I saw it at the Big Chill where I was running a stage; participatory, constructive, creative partying, where the crowds go not just to be entertained but to plug into something bigger, to be part of something.

If 2011 was the year when dance music's natural tendency to fragmentation was taken to extremes, this album was the one that bound those fragments together into one demented but scintillating vision. Russell Whyte – Rustie – comes from a very particularly Scottish club scene that is the perfect antidote to the idea that musical connoisseurship means nerdiness.

Joker, aka 22 year old Bristolian Liam McLean, is one of the most individual talents of the dubstep/grime generation. His long run of dancefloor-directed single releases, some originally recorded when he was in his early teens, showed natural gifts for finding the funk in the sparsest rhythms and for frazzlingly catchy melodic synth riffs which meant his productions leapt out of DJ sets wherever and whenever they were played. Now, following a quiet 18 months, his debut album shows that he's not content to rest on his laurels.

When I lived in Brighton in the mid-Nineties, a certain type was 10 a penny. Young, stoned, middle-class buskers, acoustic guitar strummers who were au fait with hip hop and able to improvise endless streams of witty wordplay and often to make human beatbox rhythms. They tended to have an innate sense that what they were doing was a novelty act, though, and as if embarrassed about adopting the tropes of rap for their whimsical amusements they rarely pursued it as more than a cabaret act – although you can hear echoes of what they did in certain bands of the time such as Gomez.

At the start of September, the fourth Outlook Festival takes place in a 19th-century fort on the Croatian coast. Already this festival has become a vital point in the calendar for those involved with dubstep, grime and other UK underground scenes – not only a jolly in the sun (“dubstep's Ibiza”), but the one time in the year when everyone involved takes a break from international touring and comes together in the same place, a time to compare notes and take stock of the progress.