Love streaming music so much you wish you could take it with you? If you’re a Slacker.com streaming music fan you can. The Slacker G2 is a portable device that prefetches your Slacker.com personalized streaming music playlists and puts them on a portable player so you can take your streaming music with you wherever you go (no Net connections needed). Slacker is selling a $200, 25-station 4GB model and a $249, 40-station 8GB model. Downloading and listening to Slacker.com streams is free, but ad-supported. The premium ad-free service costs $10 a month.