Anyone trying to develop a commercially viable electronic laboratory notebook system needs to address the single biggest usability issue facing this approach: hardware.
Mobile devices are not only getting cheaper and more powerful, but they are practically begging for laboratory notebook-like applications to be built specifically for them. Their chocolate-bar form factors, low startup latency, and pin-sharp graphics make them intriguing candidates to replace awkward laptops and tablet computers in chemically-hostile environments.
The problem is that the mobile device industry is still in its infancy; unlike laptops and desktops, there is still plenty of room for newcomers to turn the market upside-down. Fewer things are more discouraging to a potential application developer.
I haven't yet used Titanium Mobile, but plan to do so in the next few weeks. If you have a small laboratory application that could benefit from software written for a mobile device platform, I'd like to hear from you.