Question

I must be being thick, but I can't see (or find out how) to offer a bounty on a question.

Answer 1

From FAQ:

What if I don't get a good answer? In order to get good answers, you have to put some effort into the question. Edit your question to provide status and progress updates. Document your own continued efforts to answer your question. This will naturally bump your question and get more people interested in it.

If, after two days, you still don't have an answer you like, you can offer a bounty. Slice off a bit of your own hard-earned reputation -- anywhere from 50 to 500 -- and attach it to the question as a bounty. We'll even throw in 50 reputation to sweeten the deal. The bountied question will appear with a special icon in all question lists, and it will also be visible on the home page Featured tab.

Once initiated, the bounty period lasts seven days. If you mark an accepted answer, your bounty is awarded to the answerer (do note that accepted bounty answers are permanent and cannot be changed). If you do not accept an answer in seven days, the top voted answer will automatically become the accepted answer, and half your bounty will be awarded to that answer. You will always give up the amount of reputation specified in the bounty, so if you start a bounty, be sure to follow up and accept the best answer!