Actually, BOTN, if you held off on buying tickets from the SFA for the home section, a few spares closer to the away section, around or near block 115 of the Lisbon Lions Stand, are bound to turn up from Irish fans who bought their tickets as insurance but who will also be sorted by the official FAI allocation when it is announced. A lot of fans who are waiting for word back from the FAI still went ahead and bought home section tickets as back-up just in case they weren't to have success through the preferred FAI allocation. It's your own call really. Add your name to the exchange list here or keep an eye on these threads on YBIG and you might be lucky: http://www.ybig.ie/forum/scotland-ti...opic49987.html and http://www.ybig.ie/forum/match-ticke...073_page1.html
Alternatively, you can wait and hope that the FAI allocation is increased and tickets become available. It might be best contacting the FAI via phone or email for news on that. Even if they were to receive more tickets, it's unlikely you'd have any luck though unless you were one of the original applicants. The original allocation was 3,600. I understand they're hoping to increase it, although there is no guarantee. 5,000 has been a figure bandied about, but even if this were a realistic target, the FAI stated the other day that they'd received 10,000 applications, so they'd presumably have to sort all those people out first before any became available for general public sale.
The other option, of course, is to go ahead and buy SFA tickets now, assuming there are still some on the site. At least it means you would have match tickets and you could always try get rid of them if you happen to stumble across something more ideal then in the time being. I don't imagine tickets would be too difficult to shift; there'll be plenty of Irish fans looking for them. In fact, I may do that with mine if I can somehow manage to get my hands on official away section ones. I shall see what transpires. At the minute, I'm not overly concerned though as the tickets we have are in a decent position immediately beside the away section and I have a feeling there'll be quite a few Irish bunched around the block too.