Rush was not expected to arrive at the Arms Park until November but the Blues are desperate to land the star in time for the opening Celtic League match on September 3.
The dynamic ball-carrier and highly effective line-out weapon is still contracted to his province Auckland who want him to remain until the end of their season on October 22. But the Blues want the 28-year-old Super 12 star on board well before that - and the player himself is eager to begin his new career in the Welsh capital as soon as possible.
Blues chairman Peter Thomas and chief executive Bob Norster flew to New Zealand last week in a bold attempt to negotiate an early release for the eight-times capped Rush. And since his return to Wales, Norster has written to David White, chief executive of the Auckland Rugby Union, to follow up the face-to-face meeting.
"We went to New Zealand in person because it's always easier to meet with people face-to-face. Now that we are back, we are continuing to hold pro-active negotiations with the Auckland RU," said Norster. The Blues' case may be helped by the fact that highly-rated young Auckland back-rowers Jerome Kaino and Angus McDonald have not been included in the All Blacks squad for the Tri-Nations.
"I have written to their chief executive to try and get some feedback in the wake of the All Blacks squad selection. We are obviously very keen to have Xavier on board as soon as possible because he's a top-quality player and we believe he will be a huge asset to our squad," he said. "He is keen to come over sooner rather than later and we are working hard towards getting him here for the start of the season."
The Welsh Rugby Union has announced a major new sponsorship deal with Gullivers Sports Travel which will make the UK's leading, and longest established, multi-sport tour operator, an Official Supplier for the rest of the decade.
Having taken part in seven World Cups as a player and coach, Liza Burgess hopes to go out in style this afternoon when Wales take on Australia in the Play-off for seventh and eighth place in the Women's Rugby World Cup in Paris.
WRU Head of Rugby Josh Lewsey met with volunteers across the game earlier this week, championing their role in the sport. He was joined by Wales captain Sam Warburton for part of the day as volunteers took part in a 'Try Out' event for the 2015 Rugby World Cup
Wales Women may not have got the results they wanted recently on the field, but off it they have made massive strides in strength and conditioning - and that is in no small part due to S&C coach Sam Dodge.
Two weeks into the new pitch project at Millennium Stadium, Groundman Craig Campbell takes staff on a unique behind-the-scene tour of the works so far and National Squad Assistant Strength and Conditioning Coach John Ashby and Tour Guide Peter Owen describe what the revamp means for them.
Try-scorer Jenny Davies and fellow prop Megan York reveal to WRU TV's Graeme Gillespie their thoughts after Wales broke their drought in the Women's Rugby World Cup with a 35-3 win over South Africa in Paris.
Wales Women are expecting a tough battle against South Africa on Saturday as both teams seek their first pool win of the Rugby Women's World Cup. WRU TV's Graeme Gillespie talks to head coach Rhys Edwards and lock Jenny Hawkins.
Wales' Sam Warburton took a group of employees from Admiral on a behind the scenes tour of the Millennium Stadium and WRU TV tagged along to bring you a snippet of what it's like for the players on match day