The “AIM” in Aimster has apparently cost the fledgling music-trading Netco its online address, after a tussle with Internet giant America Online. Domain-name dispute resolution org the National Arbitration Forum ruled that Aimster must give up the aimster.com, a1mster.com, aimstertv.com and aimstertv.net domains to AOL, which owns the rights to “AIM,” an acronym for AOL Instant Messenger. In addition, Aimster voluntarily gave its “icqster.com” and ic2ster.com” domains to AOL, which also owns the ICQ instant messaging service. Aimster distributes software that lets users trade music and other files through the AIM service. The company had argued that the “Aim” in its name referred only to the software’s ability to “target” files, the NAF said.