Not really, I mean I could carry them, but it' highly impractical because I'd have to change in and out of shoes every half hour and 20-30 times per day.

From the sounds of peoples' responses here, I should just stick to clips and straps while working.

I still would love to go clipless, maybe just for longer rides, or rides that bringing walking shoes along would be practical. If I go that route, I've have the Shimano m520's in mind for a while...