No, really, it is!
HereÂ’s the why:
http://office.microsoft.com/en-us/sharepointdesigner/HA103607611033.aspx
Link to download:
Looks like SharePoint will have a new version in 2010. Features may include (the rumor mill says) it will be 64-bit only, claims-based authentication, and JQuery/SharePoint vNext. Should be exciting when we all upgrade in 2011 ;-)!!