Raceway or cutting the drywall are basically your only options for that many wires. For onesies and twosies, you can fish them with fish tape. Another option is hiding behind baseboards. Check my DIY thread on this topic HERE.
47LG55 LCD | Yamaha RX-V565 | HD DVR | PS3 | Wii | 2 X Trio12 DIY subs | 3 X Energy Take FPS, 2 VS Surrounds (SS), 2 X Take LCR (SB)
Upstairs: 2 X RC-70, Yamaha RX-V863, Monitor Audio RX-w12 Sub
Bathroom: 2 X Energy Take LCR
Car: Sony Xplod HU | Xplod 6X9s | Kenwood 4"s | Alpine Type S 12" sub | Rockford Fosgate Amp | Legacy Amp