[inquisitor]

@andy
Apps have some major advantages over websites: They are more comfortable to use, as they are more finger-friendly while even mobile websites are often a pain to navigate through on touch screen phones, and further you can enhance usability by context menus and other control elements, which you can't have on a website. Even if you want to make a mobile website finger-friendly, you can't do it for all devices due to the broad range of resolutions and at least when it comes to bitmap graphics you can't size them relatively in HTML. Another point is, that apps include a lot of the graphics, which therefore don't need to be downloaded each time and so increase performance over websites, which need to be reloaded completely including all graphics on each visit.
Also you have a lot of APIs, you can use for apps, such as accessing contacts, locating or integrating Google Maps (including multi-touch gestures, which you won't have on a website).
Lastly your brand is flashier if it appears with a large icon in the apps menu compared to a bookmark in the browser (if such is set at all).