According to the schedules there are 8 aircraft nightstopping on the 7 stands so I guess one will have to get towed away each evening.
But to get back to the original thread started by Paxboy. The runway work is not only safety driven, but the short extension is, if one can see through the quotes attributed to politicians in the local press, to add to the encouragement given to a LCC to start operations. One LCC (Easyjet as I recall) has indicated that runway length was a factor in not starting a London area service. (I would also have thought the small catchment area at one end of the route might also have been a factor...)
I was wrong with the timing. IoM Government budget book has this work starting 2007 through 2009 with "runway refurbishment and airfield equipment" in 2008 through 2011.
The development plan for the airport also has the construction of a new control tower (2007-2009), further apron extensions (2009/2010) and the extension of the departure lounge through the area now occupied by the much modified WW2 control tower (2010-2011).
Always assuming the Government has the cash to pay for it all, of course!