http://typographica.org/typeface-reviews/swagg/

hhp

Typographica's year-end round-up is a great snapshot of what's happening now.
http://typographica.org/features/our-favorite-typefaces-of-2011/

A recent release that might be of interest:
http://processtypefoundry.com/fonts/chrono/

Alright Sans is somewhere between neo-grotesque and humanist and has been relatively well received:
https://okaytype.com/alright/sans

I would suggest you look at publications/ads/websites that you like the typography of (or which give you ideas to pursue), and try and identify the fonts used. Then eliminate the oldies and retreads.

Alternatively, you could investigate the rationales behind a variety of new faces, and see if any of the theory strikes a chord with your own design interests.

To get a feel for who is designing what, start with MyFonts and FontShop, which distribute the majority of contemporary designers/foundries, and add the self-distributors to fill out the picture:
http://typophile.com/node/92109

Get on the mailing list of foundries/distributors, for email newsletters.

BTW, often there's nothing more up-to-date than something retro! :-)
http://typophile.com/node/66441
(Although that top image is an old version.)

hhp

As nearly as I can tell, coming up with a new twist—no matter how slight—on a double-story a goes a long way toward peddling a sans typeface nowadays…

Thanks for the comments. I do have some examples I'd be interested in ID'ing, so will post in the ID forum. Funny you say that oldnick, a lot of what I read about new Sans Serifs does seem to revolve around how the lower case a has been handled. I'm fairly worried I'll spend hundreds of dollars on a family that will look dated in a years time...

I'm fairly worried I'll spend hundreds of dollars on a family that will look dated in a years time...

That's the Avant Garde for you..