I have noticed that the amount of data on my Facebook app, and to a lesser degree my Twitter app, is increasing, and like many/most Desire owners I am conscious of the available memory on my phone. A couple of days ago I had 55 MB left, today I am suddenly down to 53 MB, and Facebook has now become the largest app on my phone, having overtaken Google Maps. If I deleted the data on both Facebook and Twitter I would reclaim nearly 9 MB. Before I take this step, I would like to know what effect there will be if I do delete the data? What will I be losing? I have no intention of deleting data from other standalone apps, but it seems to me that the Facebook and Twitter apps are just mobile reflections of what is available on the web, so I reckon there wouldn't be much risk if I deleted data. Or am I wrong? If it's any use, I am using Facebook version 1.5.1 and Twitter version 2.0.1. I really wish both of these could be moved to the SD card. The same applies to Google Maps - if Google Sky Maps can go to SD, why can't Google Maps? This would save me a huge amount of space. Thanks for your help.