WordPress made some changes to the available themes just before Christmas which I have only just noticed.
I particularly like the changes in Regulus 2.0 by Ben Gillbanks as you can now customise the theme a little. You can choose to have the calendar displayed (Howard will be pleased), change the ‘Blogroll’ to use link categories, change the header image and the colour scheme. Also, the irritating ‘Message essage’ bug is fixed.