Yesterday Microsoft announced its acquisition of devBiz, the developers of TeamPlain (a web based interface into TFS). As a result of this, you can now download and install TeamPlain for free! - you will of course need a TFS CAL to access the server through TeamPlain. We will be rolling TeamPlain into the boxed product in the future, but as we are allowing access to it as soon as we could, we haven't even had time to re-brand it.
I've included some screenshots below, but for more details about TeamPlain, see
Oh and if you want to read more details about the deal, support arrangements, etc ... see
Create Work Items
Query Work Items
Edit Work Items
Of course you can do a whole lot more than this, but there wasn't really too much point in me reprinting the whole of the devBiz web site.