Ok, I talked to somebody in FDOT about this.
While FL-470 is still not shown in the GIS, it seems that only the 'widen' parts around the I-75 were transferred to FDOT and are really part of FL-470 and no longer CR-470. So, that means about only 0.5 miles of FL-470 at this time.
There's a future project that they plan on taking FL-470 all the way from I-75 to the Turnpike, but there's no funding and thus the project is on hold.
So, this is what I have for a FL-470 file:
CR490 http://www.openstreetmap.org/?lat=28.755120&lon=-82.105106
I-75 http://www.openstreetmap.org/?lat=28.754285&lon=-82.101600
CR527 http://www.openstreetmap.org/?lat=28.754170&lon=-82.097569
Will submit this when I do my next update.