Nintendo have confirmed that the release date for the new DSi LL in Europe will happen early next year. In a statement to VG247 they said:

"Nintendo today confirms that a new Nintendo DSi XL console is launching in Europe in the first quarter of 2010. The retail price of the Nintendo DSi XL is expected to be higher than that of the Nintendo DSi. Further details will be released soon."

Looks like there might be a possible a name change for the Western Markets!