Dark Wood is the latest addition to wp.com themes. Most notable feature: it allows you to upload a background image (without resorting to html workarounds that, as we’ve been threatened, will soon be blocked).
Not as good as it sounds, though: your choices will be extremely limited, because of the theme’s color palette.
(Examination question for design students: text in posts and widgets is cream; links in posts are pink, and so is the tag cloud; blog title is black; tagline, post date, author e.o. are light grey; bg to blog title and tagline is a yellow ochre transparency; bg to top navigation is a dark grey transparency; bg to main blog area is a light brown transparency; post titles are turquoise; widget titles are melon; list bullets are green; calendar is chocolate-brown & maroon-brown & very dark brown; search box is, well, turd-brown; plus you’ve got a pink & green & yellow flower before post titles, plus three symbols in the post metadata – an orange & white one, a blue & and ochre & brown one, and a light blue one; find appropriate background colors…)
Anyway… There’s a problem with tables: an html table (in a post or a page or a text widget) will stick out sorely, because table cells adopt a chocolate-brown background.
To override that, add this into each td tag: