As promised by Microsoft, covered by many many others, and incidently delivered right on time, Reporting Services Service Pack 1 is now available.
I'm getting ready to load it up over the next couple of days. The big thing we've been waiting on is better Excel support (for versions prior to 2002) and grouping in Excel (which was in the beta, but pulled for the final product).
The main gripe I'm hearing from my users is not being able to print directly from Internet Explorer. I believe it's got something to do with IFRAMEs, and the workaround I'm offering is to export to PDF and print it there.