No. The best it could get is a more robust location triangulation than what Google Maps currently offers. The 3G iPhone will have an actual GPS chip in it that will work in conjunction with the cell towers, so without the GPS chip a mapping program is pretty useless.
Originally Posted by MagicSiebz
If you're trying to determine whether a bluetooth gps receiver will be available, probably not. With the inclusion of GPS in the second iteration, it seems unlikely anyone would want to support GPS only for the first generation. By the time they had a product on the market the original would be over a year old, probably closer to 2 years...and there just wouldn't be a big enough audience, since they'd be developing for a discontinued product where their market would constantly be shrinking as people upgraded to newer iPhones or other phones.