If you have eWallet on your iPhone, be very careful with that "Update all" button! Installing the new 7.0 update will break syncing with the current desktop counterpart (version 6.1). They promise to release an update of the desktop version that will fix this next week, but according to the release notes in the appstore you may have to pay for it! Read more about it on their blog (also take a look at the user comments):
http://blog.iliumsoft.com/2009/11/26/what-happened-with-ewallet-7/
http://blog.iliumsoft.com/2009/11/26/what-happened-with-ewallet-7/