Exhibit 2.4 [LOGO OF NETRATINGS] 890 Hillview Ct., Milpitas, CA 95035 Phone: (408) 957-0699 Fax: (408) 957-0487 March 29, 2002 Earl H. Doppelt ACNielsen 177 Broad St Stamford, CT 06901 Re: Agreement and Plan of Organization ("Agreement") dated October...

                                                                     Exhibit 2.4

[LOGO OF NETRATINGS]
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Phone: (▇▇▇) ▇▇▇-▇▇▇▇  Fax: (▇▇▇) ▇▇▇-▇▇▇▇

March 29, 2002


▇▇▇▇ ▇. ▇▇▇▇▇▇▇
ACNielsen
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Re: Agreement and Plan of Organization ("Agreement") dated October 25, 2001


Dear ▇▇. ▇▇▇▇▇▇▇:

NetRatings and ACNielsen have mutually agreed, in accordance with section 7.1(a)
of the Agreement, to terminate the Agreement effective as of the date of this
letter.

The signatures below represent the parties' mutual consent to this termination.
Please sign and return to my attention.


Sincerely,

/s/ ▇▇▇▇ ▇▇▇▇▇

▇▇▇▇ ▇▇▇▇▇
NetRatings, Inc.

  /s/ ▇▇▇▇ ▇▇▇▇▇▇▇
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▇▇▇▇ ▇▇▇▇▇▇▇, ACNielsen

  3-29-02
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Date



cc:  ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, Esq.
     ▇▇▇▇ ▇▇▇▇▇▇▇ LLP
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     ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇