Er, I may be wrong here, but you're all saying that he'll help Taibu along, when I'm like 90% sure on the wisden site it says he's handed in his resignation to all forms of Zimbabwean cricket, so like, he's not going to play any more at all, except in County Cricket.
Edit: From the wisden site.
"Heath Streak has resigned as Zimbabwe's captain. Streak made a series of demands to the Zimbabwean Cricket Union, threatening to quit the game altogether if they were not met: but the ZCU called his bluff, and he has been replaced by Tatenda Taibu with immediate effect.
According to the ZCU, Streak presented their board of directors with an ultimatum during their quarterly meeting. His demands included the immediate review of the selection panel, to leave a maximum of four selectors who would not be directors or commentators and who should have played first-class or Test cricket.
Streak apparently said he had no confidence in the teams being selected, and added that he was under stress as he was doubling up as the players' representative, and the players were continuously raising grievances to him. Streak had earlier said that he was not happy with the management of the team, or with Geoff Marsh, the coach, saying that he had misrepresented him to the selectors.
Streak, who is still only 30, has played 59 Tests and 183 one-dayers. He has had two stints as Zimbabwe's captain but, despite the odd success, he was unable to change their fortunes. If indeed he has played his last game for Zimbabwe he will follow other big names, such as Andy Flower, Alistair Campbell and Henry Olonga, out of international cricket.
Okay, so I can't remember where I saw the handed in resignation to all forms of cricket thing, but yeah. He might be leaving the team alltogether.