With analysts going bananas for the prospects for IBM Corp’s share price and investors pushing the shares to heights not seen for two or three years – they are hovering around the $68 mark, which compares with an all-time-high of around $179 – it’s good to know that someone at the helm still has his feet on the ground: chairman and chief executive Louis Gerstner remains cautious about IBM’s future and in an electronic mail memo to employees last week, he wrote It’s fair to say we seem to be gaining momentum… there is also a temptation to sit back and start humming ‘Happy Days are Here Again’; we can’t – those old days are gone forever.