Flagr is a new mash-up which allows users to send in a description, address and comment to [email protected] from their mobile phones and which will then instantly put a flag in the map at that point. If you include a picture, that will appear too. As they say: “bookmark the real world”.

Curiously-named Sacredcowdung has a list of “All Things Web 2.0” – and very comprehensive it looks, too.

Something I’ve not seen before: the “view ads about” box on the meta-search engine gada.be. Try it out.

Update: on the face of it this is a really trivial idea (although clever enough in its own way). But if you think about it for a moment, there are some interesting implications.

Because gada.be isn’t a publisher, it doesn’t have the same preconceptions about the value of advertising that publishers do. If the targeting in Google ads is good – and we know from experience that it is – why wouldn’t you want to search just ads instead of content, especially if you were looking to buy something?

Publishers have long published lists of featured advertisers in magazines, but this is not really much of a reader service, more a sop to the advertisers. The fact is, we’ve never invested time in classification of ads to make them really useful in this way, largely because we don’t see them as information. Google (and gada.be) doesn’t have the same mindset.

eQuake Alert is a Firefox add-in which will alert you with basic information everytime an earthquake happens somewhere on earth. Better still, it shakes your browser in proportion to the severity of the quake!

Monster founder Jeff Taylor has raised $10m to launch Eons, a site aimed at America’s over-50s.

popurls is a site which pulls together all of the latest posts from popular aggregators like digg, del.icio.us, furl, flickr, reddit, tailrank and slashdot. Where will it end?

Dan Gillmor verbally slugs it out with journalism professor Samuel Freedman on the pros and cons of citizen journalism.

EContent discusses the looming online advertising inventory crunch and what, if anything, can be done about it.

The founder of Hotmail, Sabeer Bhatia, is investing $5m of the $400m fortune he made selling his email setup to Microsoft, in a service with the eponymous name BlogEverywhere.com. The plug-in allows you to post comments on any website and also see comments from other users. It also promises faster Hotmail access among other “site enhancements”.

There’s a lot of money going into behavioural advertising companies, such as the $48m which has just been invested by Technology Crossover Ventures in AdKnowledge. That followed hard on the heals of Tacoda which raised $12m in it’s third funding round. You might well think this was the new frontier…