It may be in other regional pockets. My stepdaughter from Georgia didn't say it but found it familiar. I don't know specifically where it appears, but I was told by a linguist long ago it was Midwestern. In fact, I had just met him--and I have not had a distinctly Midwestern voice for a long time; I had just then come back from a year in Scotland with a noticeable Scottish accent, now gone--and he said, "You're from the Midwest." I asked how he knew, and he said because I had just used a positive anymore.

It may also be only part of the UP. Northern Michigan U is way north and west from where I grew up: between the Manistique lakes, near Hemingway country. I don't remember hearing it from others around Detroit either.
P. S. You used it in the correct position, but it does not seem totally idiomatic to me to use it in that context. I'm not sure why; probably there are typical uses. For example, I would say things like "I'm so tired anymore," or "It's really hot anymore." But I would not say "they're a lot of fun anymore" or "things are difficult anymore." I couldn't explain what is defining the context.

>>> Carrol Cox 07/12/10 7:15 PM >>> 
> Nancy Gish wrote: 
> It's not just Illinois. I grew up in the Upper Peninsula of Michigan 
> and have always said the positive anymore. It's midwestern but 
> broader than Illinois. I have to explain that a lot anymore. 
> Nancy 

That's interesting. I taught for two years at Northern Michigan, and if 
I encountered it there in my students I didn't notice it. My wife comes 
from Arthur Illinois (sort of between Decatur and Urbana-Champaign) and 
the first time I really focused on the construction was when she used 
it. The UP is quite a distance from central Illinois, and while I don't 
know anything about Wisconsin usage, I have never encountered it from 
any Illinois resident who lived north of Bloomington. If it occurs in 
two such separated spots it may occur in others two, by what mode of 
transmission I could not guess. I grew up in southwestern Michigan -- 
never encountered it there. And even though I hear it quite a bit 
anymore it still always sounds weird to me. (And I don't kow if my usage 
in thepreceding sentence was correct ornot.) 

> >>> Carrol Cox 07/12/10 3:00 PM >>> 
> > Nancy Gish wrote: 
> > 
> > 
> > Perhaps it sounds more standard to you to say "I can only. . . ," 
> but 
> > it is perfectly standard to say "I only can. . ." also. 
> > 
> I don't read Peter so I don't know what his complait is, but on 
> alternative negative/positive ways of saying something -- 
> In central and southern Illinois people will say something like, "We 
> set 
> the table early anymore." As far as I know, everyplace else in the 
> anglophone world "anymore" is only used in negative constructions, "I 
> don't do such and such anymoe," but in this one small area it's used 
> in 
> positive constructions, "I do such anymore." 
> Carrol