I have been reading UbuntuHQ for a while now, after I found an incoming link in my dashboard :)
They have a nice collection of Tutorials and Tips, application reviews and news related to Ubuntu. You can browse the Howtos section here. They are a community site, meaning you can register and submit articles.
I’ve added their RSS feed to my blogroll, please feel free to subscribe to their feed, lots of good stuff :)
(Side note: nice blog theme too ;-D).