Upgrading Visual Web Developer Express Edition to SP1 somehow resets the registration status; after three days, VWD nagged me that it would only run for 27 more days. So I registered the software *again*, but at least got a friendy automated mail featuring the smiling face of Uwe Baumann
If you previously tried to install the Visual Studio 2005 Web Application Project package on a non-English version of Visual Studio, you had to use a workaround posted in Scott Guthrie's weblog and in some other places: install an English Visual Studio trial, install Web Application Project, uninstall the English Visual Studio trial, repair your localized Visual Studi (which, by the way, demanded three reboots). When you now try to apply SP1, you have to uninstall Web Application Project support. However this did not work on my machines. Considering the amount of time required for a logical workaround (again install an English Visual Studio trial, uninstall Web Application Project, uninstall the English Visual Studio trial, do another repair run), I just set up the machine from scratch, which worked just fine. SP1 does include Web Application Project support, so there is no hassle any longer with that.