Then I realized ubuntu would only recognize 3GB of my 8GB of RAM. (Yeah, it's a 32bit kernel but wtf? My 32bit OS X kernel recognizes all the RAM and 8gb isn't that uncommon nowadays.)
So I googled and found there was the option to install the PAE kernel (alternative would be to reinstall the 64bit ubuntu). So I fired up the packet manager, installed the PAE meta package, rebooted and nothing worked. My NVidia and Broadcom wireless drivers were not updated. X wouldn't start up.
So after fiddling with the X config files I got X to run again (by removing the nvidia stuff). Only to discover that my wifi card wouldn't work. I tried to reinstall the drivers but the jockey driver tool quitted with some obscure error message like "error, there was an error. see error logs." ... the error logs had something like "couldn't install wifi driver". (NVidia drivers wouldn't install because I wasn't connected to the internet but the error message stated that clearly.)
I went to bed and haven't tried again to get it running. I guess I will install the 64bit version when I got time to play around. (But I have a strange feeling that there will be problems with flash.)
Maybe a little rant to defuse my inflammatory comment:
I was really impressed by Ubuntu. I remember the times when I couldn't get copy and paste working between Netscape Navigator and a text editor. I remember when it was almost certain that I wouldn't get sound with my exotic non-soundblaster card. I remember when I had to fiddle hours with X-Setup to get a graphical environment.
Linux has come a long way. I certainly didn't expect Ubuntu to support something like keyboard backlight or the extended function keys of my Apple Notebook. But it did. The Desktop environment is really thought through and usable. I love that chat integration with the Desktop. I love that the 32bit version had installed binary blob drivers so I could just enter my wifi password and was online.
Nevertheless I chose the "dumb user easy linux" and went the recommended road. And that's why there's a bitter taste to it that something like updating the graphics drivers to a new kernel was not done for me, the dumb user, automatically.
But it's nice to see that there's an alternative to OS X for my Macbook if Apple should ever decide to completely fuck up OS X or to deprecate my hardware too soon.