Application Sent: 31st March 2012
Ack Received: 28th April 2012 (Dated 25th April 2012)
Bio Letter: Waiting
Bio Submitted: Waiting
BRP: Waiting
Docs: Waiting

I have applied on 31st March 2012 and am still waiting for Biometric invitation letter.

I am not sure if this link is updated by UKBA regularly but according to this link they are processing applications who gave biometrics on March 12, 2012 ...

http://www.ukba.homeoffice.gov.uk/visas ... tingtimes/

Application Submitted: March 31, 2012
Payment Deducted: Not Sure, as it was a bankers draft
Acknowledgement Received: April 25, 2012

No further interactions since then