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One thing that makes subversion such a powerful revision system is it's ability to permit multiple methods of access. Https (webdav), SSH and svnserve. In spite of svn's ability to support multiple access methods, doing so simultaniously can be quite challenging. Typically one will run into permission issues as the http(s) access will all be written to the filesystem as the user running the webserver. The ssh access will all write to the filesystem under each users given account. 

Here is one approach to permit both.

Image via Wikipedia

Do you still remember when eBay was a great place to buy and sell things? Today most auctions close with 0 bids, a minority are purchased at all. Most items are sold by "power sellers" which is really code word for businesses. Heck, most sellers are probably businesses at this point. As eBay discovers it isn't recession proof and scrambles to become a primarily "buy it now" channel it needs to remember what eBay was.

eBay was the ultimate garage / tag / bizzare sale. For the first time ever people -- consumers had an easy way to sell things to other consumers that didn't involve putting up flyers and putting things out on your front lawn. eBay was the first global C2C marketplace. eBay's purchase of paypal was genius and a beautiful marriage (unlike all of eBay's other purchases... yeah we're talking about you skype). The combination of eBay and paypal was great because now consumers which didn't have the resources or need for a merchant account were able to conveniently charge other consumers credit cards. eBay provided the channel, tools and audience for consumers to become sellers and as a result grew exponentially.

Image via CrunchBase

For the past few months Facebook has been obsessed with Twitter. It's easy to see why. Twitter is addicitve. Many twitter users are constantly on twitter. Whenever you goto twitter there is always something new happening. Facebook obviously wants this experience on facebook. Why not copy twitter. I think Facebook could do it and do it better. Last week Facebook unveiled their new home page layout. Inspite of critical feedback. It is a vast improvement with lots of potential.