Other possible reason sales are slow:<p>1) The interface on OS 4.x is terrible. Even the most simple app is a frustration to use. Most BlackBerry apps feel like some elaborate e-mail message with extra buttons.<p>2) Some apps are not compatible with all BlackBerry devices -- even relatively new models. I couldn't use SlingPlayer on my 8330. On the flip side of this there are very few (any?) applications that take advantage of the bigger screen size and nicer UI the Storm provides. It must be a drag to run ugly old clunky 7200 era apps on a shiny new Storm or Bold.<p>3) IOException() I guess this is how BlackBerry apps crash? I tried a few random apps when the store opened and found this to be a familiar outcome.<p>4) The games (good impulse buys) are lame.<p>5) Most of the commercial apps are way too expensive or serve a very small niche -- which may justify a higher price but isn't so good for volume.