It's another week, and another 25 banks have joined the Facebook's initial public offering party, bringing the grand total of financial backers to 31.

Whoa whoa whoa -- Why on Earth does Mark Zuckerberg and company need nearly three dozen banks to prepare its stock offering? First of all, keep in mind that this is also a brand-building exercise for Facebook, so it's chosen to stack its list with minority and women-owned banks. Second, it's a big IPO, and according to Dow Jones, "It's not unusual for 25 to 30 banks to work on large offerings such as Facebook's." So why not offer a long and diverse roster of players to choose from? Facebook's army of bankers looks like this:

The Original Six:

  1. Morgan Stanley
  2. JPMorgan Chase
  3. Goldman Sachs
  4. Bank of America
  5. Merrill Lynch
  6. Barclays Capital
  7. Allen & Co.

The Blithe Twenty-Five:

  1. Citigroup
  2. Credit Suisse Group
  3. Deutsche Bank
  4. RBC Capital Markets
  5. Wells Fargo
  6. Blaylock Robert Van
  7. BMO Capital Markets
  8. C.L. King & Associates
  9. Cabrera Capital Markets
  10. CastleOak Securities L.P.
  11. Cowen & Co.
  12. Lazard Capital Markets
  13. Lebenthal & Co.
  14. Loop Capital Markets
  15. M.R. Beal & Co.
  16. Macquarie Capital (USA) Inc.
  17. Muriel Siebert & Co.
  18. Oppenheimer & Co.
  19. Pacific Crest Securities
  20. Piper Jaffray & Co.
  21. Raymond James & Associates
  22. Samuel A. Ramirez & Co.
  23. Stifel, Nicolaus & Co.
  24. The Williams Capital Group
  25. William Blair & Co.