They tend to be associated with actors like Hugh Grant, Simon Pegg, Rhys Ifans, Emma Thompson and many others. Also they are often associated with writers and directors like Richard Curtis.
They range of audience that they target are clear from the films they make, for example Ali G Indahouse and Jonny English will appeal more to teenagers, whereas Notting Hill, Love Actually and Wimbledon appeal more to adults and in particular women as they are romantic comedy which is generally associated with females.
Films like The Borrowers, Nanny McPhee and Loch Ness are more for children and younger audiences, and then there are films like Elizabeth, United 93 and Frost/Nixon which are more serious and these will appeal mainly to adults.
On the working title website they use different types of multimedia, such as trailers, photographs and film posters to try to get people who visit the site interested in their films. For new releases they give little tasters, like trailers, to try and encourage people to go to the cinema and watch them. Also the have an archive for old films they've made to encourage people to go and buy their films on DVD.
To date Working Title has produced 120 films the first being My Beautiful Laundrette in 1985 and the most recently produced being an Indian Summer due for release in 2011.
They currently have no films in production but they have many release over the next few years.
The company was formed by Tim Bevan and Sarah Radclyffe in 1982.
The company was born out of Universal Studios and the BBC.
I would not class Working Title as an "Indie" film company as it is a large company and it is essentially owned by Universal and is not really Independent!
Some UK films produced by the company are: About a Boy, Bean, Four Weddings and a Funeral.
Some US films produced by the company are: Frost/Nixon, Wild Child, Smokin' Aces.
Of all the Working Title films I have seen 18.