There are many people I know with no qualifications of any sort in any type of computing subject that hold senior positions in the IT industry. When I started out there were no qualifications of any type you could get anyway. If you can remember the PC com port addresses and such issues, and have a general knowledge of PC’s i.e. you have had lots of problems with you machines and have fixed them all you will be able to obtain a A+ certification with just a few weeks study, mostly reviewing old exam papers etc, this could get you into a large organisations (like PC Word here in the UK) first line customer support department. But really the minimum certification to get your foot in any door now is MCSE. This has recently become much harder to pass as the “interactive” questions are biased to a more general understanding (and hence experience) and not so rigidly academic or based on what you can remember from memory or books.
An IT degree is the next best thing, however as graduates here only have a broad knowledge and are not experts in any specific field they are treated with caution by companies, especially those whose head of the IT department has no qualification in this area (which is most). Indeed some treat them as a direct threat. I have seen this operate first hand over the last ten years especially if the person with the degree is a woman.
There is no doubt in my mind that experience is far more valuable the academic qualifications so just don’t tell anyone what qualifications you have, that way you will not be perceived as a threat but a potential member of their team, they will even ask you different questions at the interview.
Most companies are not IT based but rely on elements of it which they consider to be side-issues unless you work for a credit card company, bank or mail-order concern otherwise you will be looking at personnel systems, payrolls, stock control and the occasional company web site, small networks (less than 100 users) and solving problems with Excel, Outlook, Access and Word, mostly of a mundane nature and network “brain-dead” problems like leads falling out of cards/sockets etc. If you can solve these basic issues quickly they will think you are wonderful.
I have learnt over the years in IT to conceal your qualifications as they will be held against you by the powers to be.