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]
000 Xxxxxxxx Xx., Xxxxxxxx, XX 00000
Phone: (000) 000-0000  Fax: (000) 000-0000

March 29, 2002


Xxxx X. Xxxxxxx
ACNielsen
000 Xxxxx Xx
Xxxxxxxx, XX 00000

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


Dear Xx. Xxxxxxx:

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/ Xxxx Xxxxx

Xxxx Xxxxx
NetRatings, Inc.

  /s/ Xxxx Xxxxxxx
-------------------------------
Xxxx Xxxxxxx, ACNielsen

  3-29-02
-------------------------------
Date



cc:  Xxxxxxx Xxxxxxx, Esq.
     Xxxx Xxxxxxx LLP
     000 Xxxx Xxxxxx
     Xxx Xxxx, XX 00000