Just checked it out on my Blackberry Curve. If you know what plant you're looking at, the info in the Full Plant List is great because you can go directly to it and see how to use it. I went to "nettles" and found what I was familiar with. As for being stung -- yep, BTDT many times.
The problem is when you don't know for looking. I thought location meant geographic in the states, such as Desert Southwest or rainy Northwest. Filter down the possibilities so a photo ID could be used. In the PNW, nettles can be found anywhere they're allowed to grow, sunny, shade, under trees -- very hardy and tolerant plant. Unfortunately, your DB doesn't include sunny or shade in the description. It says, "woods, borders, abandoned areas" and if I find nettles in the middle of a field I wouldn't filter for the locations in your DB. If I stumbled across nettles in the DB I wouldn't be sure; with the photo resolution on a Blackberry Curve, a second close-up shot of the leaves would be more useful than a whole group of plants. That said, just touch them and you'll know what they are
All in all though, I like it. Thanks.