Two interesting things i discovered today,
1) an excellent website for themes – http://deluxethemes.com/ , i really like their themes, sorry for not knowing them earlier.
2) wordpress version 2.8 will be released very soon, more information can be seen here. some exciting new features. http://codex.wordpress.org/Version_2.8
One more useful link by devsnippets.com about some impressive ways to spice up your theme: