See 863211's for more explanation

我下一步該怎麽做呢？
- Return to US. But be careful with I-94 card, whose expiration date should be same with I-797 approval notice of your current H1-B.
我現在還可以用I7979上的三年的I94,但當我馬上出境回來用新的i94時就隻能是到簽證上的那個時間了6/15/10，
- When come back to US, use your new visa. The CBP officer should give you a new I-94, which should match your I-797. If not, you can request a correction to the CBP, or go to a CBP port entry inside US.

此時是否意味著我的H1B身份就過期了呢或者說我在美國境內此時開始就是非法居留了因為I-94那時就過期了啊，就必須再開始申請新的H1B延期呢？。。。
看來這問題大了。
謝謝謝謝給我主意。