I've installed Service Pack 1 on the server and development machine, and ran into three issues right off the bat when I opened my old workflows test project:
1 - My environment lost its 'host' name. A trivial task to go to the object browser and use 'Change Server' to set it back. Fine, complete.
2 - Could not build the project due to an xml exception on the 'ConfigurationManager.config' file. I went in and removed the offending tag (it was some sort of 'Beta' tag, sorry I don't have the details anymore) and now my project builds. Fine, complete.
3 - When I attempt to deploy my project, the wizard fails to start with this error: 'You need to define an environment for this project before you can deploy. Please define one before you deploy.' This one, I can't seem to get past. I don't know HOW to define whatever environment it is looking for. Any hints? Seems to be related to issue #1, but that fix did not addres this problem.