Jason Sanford has some words of advice for writers thinking of submitting work to online magazines:

“For writers, online genre magazines are not only a great way to build readership and name recognition, they also tend to be more accessible than many print magazines, with most accepting electronic submissions, featuring rapid acceptance to publication turn-around times, and a willingness to work with new writers. However, all online magazines are not equal in the exposure they bring to a writer’s story.”

He even includes an up-to-date list of well-read online markets, which you can read here.

Speaking as someone who had stories published online before graduating to printed magazines, I think it’s worth a read.