First, Vista SP1 is available for download; but you have to upgrade your drivers(Intel 945 chipsets) in Vista, before you load SP1. Vista drivers are componentized, Therefore old drivers had to accommodate new Vista instructions.

There are more worries of SOA on web service API. Web service has tunnels(cookies) for hackers. But Vista has synchronized ATM feature to block hackers from far away ISPs, before ctty or virus/worms in cookies can happen.

When data is received from the web; it has three copies, one in dram, one in virtual memory of hdd, then one in raid5 permanent records in hdd. Hackers can not hack all three at once. So, compare in virtualization can restore any hacked copy before the data is used. Did you notice, in IE, you can read web pages offline, now a days? Only secured encrypted data needs to be using web service?

Vista is ready for SOA apps on the web. Server 2008 will prove itself?

Of course, Linux has to depend on FireFox for SOA apps. But FireFox has to support XML(DB2, etc.) first, and rendering text based data in framebuffers, by zooming into monitor resolutions?