There is an article in the the moscow times with the headline.
"Tymoshenko eyes cheaper gas in 2010"
http://www.moscowtimes.ru/article/1009/42/373827.htm
The article is however badly written as it said Tymoshenko made the announcement then goes on to say she is happy with the deal but won't let Yushenko derail it.
I don't know hwo the Ukraine can be seen as reliable and a future EU member if she wants to break a deal that has just been made.