The latest Diamond Previews catalog informs us that Web Spinners #18 is noted as the last issue! And yet - Spider-Woman #12 is there and doesn't say "Last Issue" like it really should! Where's the sense in that?
However, Mike Fichera tells me he's heard some buzz that Spider-Woman may be cancelled soon. That's good news! Hey, maybe Web-Spinners #18 is the final issue because they're choosing the best creative teams from that title to take over the two core titles? Now that would make some sense!