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I found OGMRip late, but included it here to provide one more option. I didn't actually run the program myself so I can't give it a rating, but the website gives a good overview and a number of screenshots so you should be able to get a good feel for what it can do. The main downside to this one for me is the lack of any deb package. Of course it can be installed from the command line, but I prefer to stick to the Debian packaging system wherever possible so I can more easily manage updates.
Thoggen has promise, but it's currently still in beta and it shows. I used version 0.4.2-2.
Like K9Copy, Thoggen aims to provide a very simple interface that still gets the job done. But unlike K9Copy, it supports transcode to a single file. Thoggen currently only supports the Ogg Theora format, but it is based on GStreamer and the website indicates other formats are likely to be added in the future.
Once complete, Thoggen will likely rival K3b, but for now it is very slow (the developer acknowledges this) and I could not get the rip to finish. As time passes and bugs are fixed it will definitely be worth reconsideration, especially if you are a Gnome user. Because of the beta status I will decline to provide a rating at this time. Hopefully you will have more success with it than I did.