Below is what I wrote on a couple of recent articles on the Xperia arc. Please feel free to amend this to suit your purposes. Also, please improve on my attempt and post your scripts for other people to post -- and provide links to some of the high traffic sites. Because SonyEricsson really is demonstrating its commitment now, spreading these messages really does have promise to force SonyEricsson to change course -- if they want to continue selling phones!
With contracts being typically 2 years, SonyEricsson's decision to abandon updates to the Xperia X10 series in less than one year is disgraceful, especially with the benefits of 2.2 (adobe flash, install to SD, processor optimizations, etc.).
And with SonyEricsson demonstrating this attitude with the existing, high-performance Xperia X10 series (which is more than capable of running 2.2, 2.3, and later), why would anyone trust them to do any different on the new Xperia arc?
The meaning of SonyEricsson's choices now are obvious to informed consumers: if you want to get the improvements to your phone that come from new versions of android, avoid SonyEricsson. HTC and others have a *much better* track record for providing updates to their customers.