Erik Moeller wrote on his blog "Micropledge.com & paying for free culture". In many ways it is a really nice idea. All the Micropledge projects as they currently listed have one big failing, they do not state how much money is needed for any of the projects.
Erik proposed and probably pledged some money for a project called "RSS extension for namespaces with smart quality filtering". Twenty dollars have been pledged (US / Canadian / Taiwan it does not say..) and two people bothered to comment on the project .. they like it :) . I however would not pledge money to it as it is completely unclear how much money is needed for this job.
Micropledge is a young project and it deserves a chance. So I asked the CTO of Open Progress to come up with a budget that would allow an expensive developer to do the job. Some money would also be set aside for the necessary overhead. The point is not that Open Progress wants to do this job, the point is that there will be at least one Micropledge project that has a target amount associated with it.
In many projects like Rentacoder, you can post a project and developers can bid for the project. I sincerely hope that a good developer will want to do the job and will do it for less then the amount we will post. Bidding for projects is however not something that Micropledge caters for at this moment in time.
When in the end it turns out that enough money has been pledged, Open Progress will do the job. For us it is an experiment as well. Will posting a realistic amount of money get more pledges, will we in the end be asked to do the job ??