I would not. The 2GB RAM cannot be upgraded, so that right there is a pretty limiting factor going forward. Plus, the latest gen is just a much better machine than the core 2 duos.
If money is tight, consider the 11" MBA (current version). Otherwise, sit tight and wait for the next gen MBA and wait for the prices to drop on the current gen.
The 2GB ram limit is a big no no, especially with today's software. It is a very limiting factor of the MBA.