I've found that in areas with lots of electrical interference (i.e. near a large computer network) I can't get the show on my walkman. Is it the same way with satellite radios?

I get some staticcy sound or a competing radio frequency temporarily overpowers when driving by a power plant or on a girder bridge.

completely diff issues.

satellite is LINE OF SIGHT!

so if you can see the sky (some cases, you need a wider view of the sky), then you have sirius.

sirius does use terrestrial repeaters, which means, it beams it to your receiver like am/fm radio, so in this case, you are still out of luck...

damn. :(

Does XM have the same problems?

yes... both are satellite.

but since XM's birds are in geo sync orbit around the equator, their inclination is worse than the sirius's birds. so they rely more on ground repeaters.

remember that ad XM had going when a small red car (a datsun 510) was driving around an office building?