In order for something to be a bug that can be fixed, it must be a bug reproducible on every single ipad. That is a bug. This thread, though it has lots of posts, is a small minority of the Apple community.
Still, you can help us track this down by following the numerous advice in this thread, in other threads, or by Googling around for your own solutions.
Try this:
1. Empty all website data in the Advanced option under Safari.
2. Turn off autofill if the crashing is happening in text fields or on websites with text fields. (You may wish to turn it off anyway.)
3. Does it happen in any other application? If so, reset network settings and post a new thread.
4. If it happened post an update, in your case, you may also find help in a better thread or google search describing safari crash and 5.0.
5. Some person prior to 5.0 suggested changing the search engine from Google to Yahoo. This seems unlikely, but if it works, it works.
6. Lastly, every person that has done a restore finds dramatically reduced crashing. If this is not true, let me know. If it doesn't fix it, the hardware needs to be replaced. Note that you should do it via itunes via USB and set up as new ipad for best results.
Diagnostic questions:
Can you provide specific links that cause crashes?
Are you using an ipad 2 or 1?
Can you try turning off cellular data for one test, and try turning off wifi for another test, and seeing whether that makes a difference?
Hope this helps.