In working with InfoPath Forms Services in MOSS 2007 I found that the web based form experience is great. And I like InfoPath but even I don’t want a logo bumper sticker to stare at all day.
By editing “ifsmain.css” on the SharePoint web front end’s 12 hive you can override the system styling to hide this element. The IE developer toolbar helped me find the CSS class (ToolbarBranding) to add the “display:none” attribute. Screen shot below.
C:Program FilesCommon FilesMicrosoft Sharedweb server extensions12TEMPLATELAYOUTSINCifsmain.css