Gizmodo quotes an article from the official WSJ blog:
“WSJ has reported on itself by saying that “according to a person familiar with the matter,” their monthly iPad subscription will cost $17.99 a month.”
Furthermore, on advertising:
“The WSJ article also addresses advertising on the iPad—apparently Time magazine will debut its iPad version with adverts from Unilever, Toyota, Fidelity Investments and three other companies, with each ad said to be setting them back $200,000 for the full first eight issues. Meanwhile, Wired magazine will offer a little extra something for advertisers who buy eight pages of ads for each issue—with video and “extra features” promised.”
While $18 for a monthly subscription sounds a little bit high to me, at least it’s a start.