Walravens today repeated his Market Outperform rating on the stock, but cut his price target to $15 from $18. He also cut his EPS estimate for the September 2009 fiscal year to 61 cents from 70 cents; for FY 2010 he goes to 83 cents, from 91 cents.

“While we continue to believe that Ariba’s software solutions should fare relatively well in this macroeconomic environment, the services business may not hold up as well as we had previously believed,” he writes. Walravens notes that the company had guided to December quarter services revenue of $32 million to $34 million; roughly 40 percent of that relates to systems implementation. He notes that product upgrades are discretionary “and could easily be delayed by cautious customers.”

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Writing about however many millions of dollars go to however many frivolous widget companies is about as interesting as watching Robert Scoble’s blog video lectures. (Sorry, Bob!)

So it is nice to see a good (and good-for-you) charity site like DonorsChoose get some money and, hopefully, attention.

The site, which lets teachers upload proposals for resources and projects–from books to playgrounds–they need funding for and matches them with donors, has to be limited in geography. But today, it will open its services to every public school in the U.S. to allow teachers nationwide to get their wish lists fulfilled online.

With the national expansion, the nonprofit hopes be on track to becoming 100% self-sustaining, according to its founder, a former Bronx schoolteacher named Charles Best.

That’s due to $11 million in possible funding from a panoply of big Web players. EBay Founder Pierre Omidyar has promised to pony up $6 million, with Yahoo’s David Filo, longtime VC Vinod Khosla and Netflix’s Reed Hastings adding in the rest. (Khosla was an early supporter, allowing the site to expand to the San Francisco area from its New York base.)

The catch for the funding? Omidyar will release the bulk of his commitment only if DonorsChoose completes the round by Nov. 30.

It seems like a pretty good investment to me, using the Internet to clarify and amplify the donating process. Sort of like eBay meets Match.com meets Amazon. So far, the site has given away $14.5 million to projects.

Best says DonorsChoose authenticates every project proposal before posting it. Then it purchases the resources when a project is funded and sends the goods off to teachers, with some donors also adding in more money to pay for fulfillment costs.

That will now be a lot cheaper and more efficient due to a donation by Ariba of fulfillment software and services to DonorsChoose that the site values at over $2 million. That follows a donation by Filo, said Best, of five Yahoo engineers who were lent to DonorsChoose full-time for five months to rewrite its code base.

But Best is more articulate than I can be, so here is a video of him talking about his site: