A default is called default for a reason right ?
Why would I change my 'default' many times, then it wouldn't be 'default' anymore.
"I always use sabayon 98% of my time but I need Xp tomorrow morning and I don't want to wait while booting to select it, so I want to choose it now!"
Sorry, I don't say it's ridiculous, but it isn't useful enough to spend time on (I think)
p.s. Instead, I would like it to see some attention to firefox, so a seperate binary from Mozilla isn't necessary anymore because of crashing issues (wmv stream) and the undefined default skin in 'themes', that's more useful because konqueror is replaced by FF and Opera nowadays by most people as the default browser of choice.