Has anyone had luck configuring FAST 2010 beta with SharePoint 2010. I've followed all the instructions and it seems to crawl ok etc but in my fast search center when i do a search I get the following error in the core search results webpart: Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.
I can't see anything useful in the sharepoint logs either at this stage.