When using the text editor for posting since this is a coding forum and the tab key is used alot. Do some javascript that inserts a tab character and prevents a change of focus on the textarea. I'm sure like using jquery you can easily find the text area's. Even better the text areas have an id, so after the page has been loaded you can add event handlers to the textareas. Its a bit of a hack and will continue to work as you update the software (provided id's dont change, or if you just scan for all textareas regardless of ID's than it would be easier to upgrade the forum software.)

It will make typing stuff here alot more comfortable. I dont like to open up a text editor all the time just so I can use the tab key, especially when its only a few lines of code.

This probably has been suggested before but I never seen it happen in these (or pretty much any forums I go to).