First of all, thank for all the great work you've put into rooting the Desire
Now, some questions (that as far as I've read throughout this thread, haven't been answered)
1) I suppose rooting the device voids its warranty. However, in the case of needing the warranty, is it possible to revert back to the original ROM, as if nothing has been modified, so it can be considered "untouched" and be eligible for warranty?
2) This one's been asked above, but you haven't answered: if *something* were to go wrong during the rooting process (either my mistake or another kind of problem), will I somehow be able to "recover" the device? As in, re-flash it to the original ROM, which would, you know, be working?
3) About the goldcard part.. Do I need a separate microSD card or can I use the one I'll actually be using with the phone? (Yes, I'm aware it needs to be 100% wiped, but this is not an issue).
4) The least important one: when doing the "Wipe/Factory reset" step, will it reset the device to the Factory settings, as if I'd have done this the usual way?