the trAce online writing centre is doing a survey of writers using computers and the internet:
trAce survey
you could win a 50 pound Amazon voucher, or one of 10 free places at the trAce Online Writing School ...

also,

Prairie Schooner, an American literary magazine, will be publishing one book of short fiction and one book of poetry each year through the University of Nebraska Press. There's $3000 prize money and publication. (That's $3000 US)
for information and guidelines see here
(the only drawback is the $25 entry fee - also US dollars)