From time to time I get the same problem: the application switcher (command-tab) stops responding. It usually takes closing a lot of programs or restarting to get it working again. Today, I seem to have found the gangster: Screen Sharing. When I closed it, application switching started working again. It must have taken over the control over a couple of keys too many.
ubd wanted to connect to windows.net, so I looked it up, and it belongs to Ubiquity.framework, that is a part of the iCloud integration. Hmm...
The man-page says this: "ubd is the ubiquity server process. It is primarily used for "Mobile Documents. There are no configuration options to ubd, and users should not run ubd manually."
Tomorrow I begin work at Trifork! 
There I'll be doing iOS development, so before I begin I thought I'd like to share a bit about how I do my development now.
First of all, I use GitHub and Beanstalk for source control, depending on what client the work is for (for my own projects, I use GitHub). Mercurial is nice, but git and svn just work with XCode, so I stick to that.
Since I have source control, I can have continuous delivery. For that I use Jenkins. Jenkins is not good enough. It's not great. It's not beautiful. It's not intelligent, easy, friendly, intuitive, or all those other nice words. But it works! I use the Clang Scan-Build, Github OAuth, Github, Pre SCM BuildStep, Redmine, SICCI, SSH Slaves ...
I'm such a sucker: now I've bought the Steve Jobs biography for Kindle, to be delivered tomorrow. I hope the book is great. I borrowed my last book of the kind to someone, but I don't know who. 
