I work in an enviable Soho loft space. Honestly, it's cool, creative, collaborative space with zero privacy. No one person has an office, and our CEO has but one rule, "Keep your cell phones on vibrate!" Otherwise, he *playfully* threatens, he'll toss em' out the window (we're on the 10th floor). I've got the SIGNAL Adviser on my desk, but there are definitely other places where I'd like to keep an eye on when I'm getting a call. ThinkGeek has a light charm that you can attach to your phone for those moments when you're somewhere super noisy or somewhere super quiet. The light charm flashes when a call comes in, so you'll blink instead of bother:)

There are two fun styles that come in red, blue, and clear. (Only for use with 1800/1900 MHZ GSM mobile phone.)

Price: $11.99 at ThinkGeek.