A four-city travelling charity tour and convention combination this October will feature Beck, Devo and host David Spade, according to the organizers. Billed as the Silicon Planet Experience, the shows will take place in San Jose, Seattle, Los Angeles and Austin. The event includes technology exhibits and play areas, and is sponsored by Microsoft.

The tickets are pricey, but four different regional AIDS charities will receive the proceeds. Starting on September 1, tickets can be purchased through Ticketmaster for $100 apiece.

This is the second year for the event. Last year saw just one very successful production staged in San Jose with the B52s and Dennis Miller headlining the bill. The 2000-odd tickets sold out in short order prompting this year's expansion.

The dates and venues are as follows:

• 10/3 - San Jose, CA @ The Old FMC Defense Factory
• 10/10 - Seattle, WA @ Pier 48, Port of Seattle
• 10/17 - Los Angeles, CA @ Barker Hangar,

Santa Monica Air Center