I'd been holding off on upgrading to OSX 10.5 for a while now - firstly because I don't, as a rule, upgrade stuff until it's been out for a good while (giving chance for any bugs to come out and get blatted) and also because I didn't feel the need to. Since 10.5 has been out for a good few months now, I decided to get hold of a copy and pop it on to my MBP. For something that weighs in at 7 odd gig, it installed surprisingly quickly - admittedly coming off a Firewire hard disk, I was back at a login prompt in 24 minutes, which is pretty impressive. That said, there's now around 550mb of updates coming down which I don't expect to complete as quickly, being as the machine is behind my 2mb ADSL - if I'd done it at work so that I can use the gigE JANET link, I'm sure it would've been much quicker.