After WWDC in June the subject of Steve Jobs’ health was a highly discussed point; at the time many believed that the Apple CEO was ill, causing detrimental effects on the stock price as well as investor confidence.

The rumours of an ill Jobs were put to bed after a reporter purportedly received an abrupt phone call from Jobs himself who revealed in detail his health.

Today, analyst Gene Munster of Piper Jaffray stated that he expects Steve Jobs to be on hand at tomorrow’s media event which should boost the confidence of investors and boost the price of shares.

“We are confident that Steve Jobs will be presenting and we anticipate his appearance at the event to be viewed as a positive,” Munster wrote under the heading Steve Jobs’ Appearance Will Be Key in his report to clients on Monday.

“While some investors are concerned that Jobs will not deliver the keynote,” wrote Munster, “we have reason to believe he will. Therefore, we believe his health has improved since the June event, which would be a positive for the stock.”

[Update] John Gruber notes on his blog that Jobs is “just as thin as he was in June”.