I can’t wait for YouTube to crash (DotCom 2.0 Crash – UGC Tears before bedtime) – better sooner than later, we’ll lose some videos but it’ll make us wake up ethics and need to secure our user generated content on sharing sites.

I also figure we’ll move away from centralised hosting services with locked down content like YouTube to decentralised peer-to-peer (flexible) networks and open content such as group-editable livecasting on Mogulus or something.

But make no mistake: this is crunch time. And it’s gonna hurt – the list includes:

Twitter

Although well-used by many and even relied upon by some (like me), Twitter has yet to turn on a revenue model. It’s not like the company would lose users, if it set up a minor advertising strategy as a test; people want to see the company make some money. Please, Twitter, turn on the revenue before it’s too late.

Meebo

This is one of the coolest online communication companies I’ve seen. I like its products and services. But the revenues for running branded chat rooms cannot be all that large. Meebo belongs under the wing of a larger company like Facebook or Microsoft, but with Meebo’s expensive valuation and the coming cutback in M&A, I fear that its exits may be blocked.

TripIt

A very useful service for organizing travel information. Wait, travel? Who’s going to be traveling more often during the economic storm we’re heading into? People are going to sit at home on their mattresses filled with cash, teleconference instead of go on business trips, and take vacations in their backyards. I fear for this company and other clever travel start-ups.

Zillow

The real-estate site’s revenue model is advertising. Real estate and bank advertising. Unless the real-estate research site starts charging for foreclosure listings, I don’t see it doing too well in a hunkered-down economy, in which people are trying to hold on to their homes for dear life, not upgrade.

the rest are here on CNET (by Rafe Needleman)

Just one thought – if we don’t have much disposable income, no money for holidays and entertainment, will we spend all our time online, catching up in social networks, and socializing in virtual worlds? This might be THE growth area in a downturn?

EDIT: Just found this – Sequoia’s Capital’s Slides of Doom or Venture Capital Warning to CEOs http://www.docstoc.com/docs/1822343/Sequoia-Venture-Capital-Warning-to-CEOs