While you wait for news of Vista SP1 rest assured that the team are hard at work addressing some of the more common issues with the current Vista release.
Two packages have been released to address a number of performance, compatibility and reliability issues that have been reported by users with have either activated the built in Error Reporting service (sounds like a very good reason to turn it on and let it tell the mothership when something didn't work) or contacted Microsoft Customer Support Services.
The first targets performance and reliability issues and is documented in KB938979 (which includes links to both the 32 bit and 64 bit versions).
The second targets compatibility and additional reliability issues and is documented in KB938194 (and also has 32 bit and 64 bit downloads).
Both of these will become available over the next few days via Windows Update (you do have that turned on don't you) but if you're keen I'd suggest grabbing the relevant versions of both for your Vista machine as soon as possible.
Much less official (so be careful what you download from here - make sure you read the instructions in the KB article to be sure it applies to you, do a system restore, take a backup, make sure you're using Windows Home Server or whatever you need to recover if it goes wrong) is AutoPatcher for a downloadable collection of hotfixes, updates and tweaks you can use to upgrade an old machine (eg because it's got no/slow connection, you've got up update lots of machines, you just want a DVD in your kitbag for quick upgrades), or VistaSP1 site that's collected a list of over 100 Hotfixes for Vista in one easy to access place...