Sounds exactly like Extras(although i guess not a bad thing),lots of cameos by big stars and revolves around a Talent Agency,and Ricky Gevais described it as a Fake Documentary(so,that's Extras and The Office then

)
so,what's the difference this time around?,well the Talent Agency is run by Warwick Davis(Willow,Return of the Jedi)and it's an agency for Dwarfs
cameo's by:
Helena Bonham Carter
Sandra Bullock
Steve Carell
Johnny Depp
Sophie Ellis-Bextor
Sylvester McCoy
Liam Neeson
Sting
from the Wiki page
"It’s a single camera sitcom following the trials and tribulations of ‘Warwick Davis, showbiz dwarf.’ Warwick is playing a twisted version of himself. He’s quite conceited and arrogant and manipulative. And he runs a [small person] talent agency, which he does in real life. Me and Steve Merchant pop up as ourselves, just to add some realism. Warwick comes round and says, ‘Doing any more Extras? Got any
see this video here of Ricky 'introducing' us to Warwick(NSFW..some swearing)
http://www.youtube.com/watch?v=39iPmE2p52Ialthough it does sound similar to his past projects i am looking forward to seeing Ricky in a TV series again,his films haven't exactly been fantastic(they are fine,just not mega great flicks),and i have a lot of love for The Office and Extras
EDIT:
found a couple more (these are fine for work)
not sure if this is Life's Too Short related,but it is Ricky,Warwick and Elmo
http://www.youtube.com/watch?v=pw2o6MM9hTI&feature=relatedthe people walking on and off in this vid below are British 'stars',so i guess it wouldn't have the same effect in US
http://www.youtube.com/watch?v=DyrOr24hdEY&feature=related