No, in that schematic they're not connected to anything - but in reality they're hooked up to tx and rx of a usb-serial adapter. The schematic I posted was more to illustrate the reason behind the pullups being turned on.
The serial values I'm using are ones I've used in another project that's working... but I'll give yours a try.
Edit.
Nope, no change...
I have noticed tho that when I send data over the usb/serial cable that the voltage does in deed dip (drops from 4.95 to 4.60v) which indicates that the signal is being transmitted (my multimeter isn't fast enough to measure the full weight of the dip)
I've also done some testing on the usb/serial cable and have found it goes to 3v when high (again probably more, my multimeter can't keep up)
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