First guess is that it's a reaction to the new gmail thing - they are giving 1GB I believe. Wish they'd do mine too (hotmail) because I like hotmail and Gmail don't work on this PC...
dunno, i know someone else has it also, but seems to have come almost out of the blue? hope it stays though, junk mail fills up the normal too quick lol
Its not out of the blue, MSN have been sending lots of e-mails about it recently but few ever read them. I rarely do it was just luck i read the one that told me my inbox was gonna get bigger.