Richy - what I recommend for now is to note down any new leads/customers in the "Notes" area at the top of the worksheet on the mobile app. These will then appear on the PC/Mac when you upload at end of day for you to action accordingly. As I say though, an add customer/job feature will be coming to the mobile app soon!
Niceandclean - it already records the day but potentially could record the time... how are you thinking you would use this data? Perhaps to monitor the time taken to do a job?
Lance - hehe yep, good point

Generally speaking the route planning software seems to be pretty good with one ways etc these days, but you might still want to tweak it afterwards (which you could of course) if you know something that the software doesn't (e.g. roadworks) but I can see it doing a good job of getting the bulk of your round in the right order, and would be particularly handy for commercial jobs which take you from pillar to post.