The short of it is yes, it should be possible to get upload quality shots with that camera, under certain conditions.
The long of it would be the conditions that would need to be met to get up to the right quality:
First, you'll be limited to shooting in bright sunny conditions. Anything overcast or with lower light will definitely lead to more noise than would be acceptable for here.
Second, you'll have to get pretty close to your subject. A super-zoom such as yours makes compromises on quality to fit all of that zoom range in such a compact body, and you'll really notice it towards the longer end of the zoom. Anything farther away than 2x - 3x zoom (50-100mm equiv.) will likely be too compromised for quality.
Third, you'll have to be pretty good with your editing techniques so that you can cover up/compensate for the lesser quality you'll be getting out of the camera.
If you think you can meet those three conditions (you'll pretty much need to meet all of them), then go for it, and you can post in the feedback forum before you upload. If you don't think you can meet all three of those conditions, but still really want to be able to get stuff uploaded, then you'll probably have to consider a better camera. If you're not too worried about uploading here, then your camera should be more than enough for you.
Hope that helped a bit,