I've released version 1.5.2 of MySpeed. Just a couple of minor bugs:
Don't adjust volume when alerting if in silent mode.
Fix a crash on some devices.
There are quite a few complaints in Market about force closes. No-one ever gave me any more info, until now, and so I've found and fixed this bug. It actually seems to be a bug on Motorola builds of Google Maps. I've implemented a workaround. If you've got a device with this bug then your "my location" dot will be yellow instead of blue.
I've pretty much finished the routing that will be released in the next version. I think it's pretty good. I'll let it settle down, and maybe add a few niceties, before I release it.