http://www.unclez.net/

Go there, then join a gym.

If she hasn't shot you a smile by now she isn't attracted to you, so if you stop to talk to her and you don't even know her she will probably just wonder who the fuck you are.

You must know someone who knows her? find out where she goes out partying and run into her there - everyone is more approachable when they are out.

She is probably on her phone all lunch so she looks busy and people will leave her alone!

If you are desperate to talk to her though, you said she is always on her mobile phone? just ask her if he signal is acting up today... just to get her talking, follow up with what network she's on or something? give her your name and just start talking - don't get sucked into mobile phone convo though she will just think your boring!

I'd go for the accidental meeting out side of work though...