VSCN Visual Sciences (MM)

IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

     Omniture has filed with the SEC a Registration Statement on Form S-4, which includes a joint proxy statement/prospectus of Omniture and Visual Sciences and other relevant materials in connection with the proposed transaction. The definitive joint proxy statement/prospectus has been mailed to the stockholders of Omniture and Visual Sciences. Investors and security holders of Omniture and Visual Sciences are urged to read the joint proxy statement/prospectus and the other relevant materials because they will contain important information about Omniture, Visual Sciences and the proposed transaction. The joint proxy statement/prospectus and other relevant materials, and any other documents filed by Omniture or Visual Sciences with the SEC, may be obtained free of charge at the SEC’s web site at www.sec.gov. In addition, investors and security holders may obtain free copies of the documents filed with the SEC by Omniture by contacting Omniture’s Investor Relations at ir@omniture.com or via telephone at (801) 722-7037. Investors and security holders may obtain free copies of the documents filed with the SEC by Visual Sciences at vscn@marketstreetpartners.com or via telephone at (858) 546-0040. Investors and security holders are urged to read the joint proxy statement/prospectus and the other relevant materials before making any voting or investment decision with respect to the proposed transaction.

     Omniture and its respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Omniture and Visual Sciences in favor of the proposed transaction. Information about the directors and executive officers of Omniture and their respective interests in the proposed transaction is available in the joint proxy statement/prospectus.

     Visual Sciences and its respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Visual Sciences and Omniture in favor of the proposed transaction. Information about the directors and executive officers of Visual Sciences and their respective interests in the proposed transaction is available in the joint proxy statement/prospectus.

Cautionary Statement Regarding Forward-Looking Statements

     This document contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. These statements are based on management's current expectations and beliefs and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. The forward-looking statements contained in this document include statements about future financial and operating results and the proposed Omniture/Visual Sciences transaction. These statements are not guarantees of future performance, involve certain risks, uncertainties and assumptions that are difficult to predict, and are based upon assumptions as to future events that may not prove accurate. Therefore, actual outcomes and results may differ materially from what is expressed herein. For example, if either of the companies does not receive required stockholder approvals or fails to satisfy other conditions to closing, the transaction will not be consummated. In any forward-looking statement in which Omniture expresses an expectation or belief as to future results, such expectation or belief is expressed in good faith and believed to have a reasonable basis, but there can be no assurance that the statement or expectation or belief will result or be achieved or accomplished. The following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: failure of either the Omniture or Visual Sciences stockholders to approve the proposed merger, and other economic, business, competitive, and/or regulatory factors affecting Omniture's business generally, including those set forth in Omniture's most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q, especially in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections, and its Current Reports on Form 8-K and other SEC filings. Omniture is under no obligation to (and expressly disclaims any such obligation to) update or alter its forward-looking statements whether as a result of new information, future events, or otherwise.