inbound - 12:07 am on Nov 22, 2006 (gmt 0)

Changing a domain that attracts 250,000 people a year through Google should only be considered for very good reasons. I'm assuming that your daily traffic volume is at least reasonable in your business area (as that could be seen as tiny or huge depending on the area).

I would be thinking more along the lines of IF it's neccessary, rather than HOW to do it.

It's possible that it could all go well, but it's quite likely that there will be hiccups along the way (some of these could be so big that they endanger the viability of the business associated with the domain).

If you must do it then 301's are best implemented as just headers (no HTML). Expect a traffic drop/stop and sleepless nights.

Best of luck.