StarWars.com previews a number of books coming out the first five months of 2008:
Jan. 16th - [i]Star Wars: Legacy[/i] #20
Jan. 30th - [i]Star Wars: Knights of the Old Republic[/i] #25
Feb. 20th - [i]Star Wars: Legacy[/i] #21
Feb. 27th - [i]Star Wars: Knights of the Old Republic[/i] #26
Mar. 26th [i]Star Wars: Episode V The Empire Strikes Back[/i] digest-sized photo comic
Apr. 2nd - [i]Star Wars: The Force Unleashed[/i] graphic novel (104 pg)
Apr. 9th - [i]Tales of the Jedi Omnibus - Volume 2[/i]
Apr. 16th - [i]Star Wars: Episode VI Return of the Jedi[/i] photo comic

See also:
Star Wars Comics For November 2007 From Dark Horse Comics
Star Wars Comics For December 2007 From Dark Horse Comics
Star Wars Comics For January 2008 From Dark Horse Comics
Star Wars Comics For February 2008 From Dark Horse Comics