hey,
so i'll go in order...
yes, allergy/imm tends to be mostly outpatient (the only times you would be consulted in house is for immunodeficiency and for desensitization)
unfortunately its hard to find out which programs are accepting this year and which are not...last year i sent out an email in july to all the programs (yes this took forever!) and asked if i could get an application and to find out if they were taking applicants for this cycle...most programs wrote back over the ensuing weeks...i got the addresses through FREIDA and there is another website
http://www.aaaai.org/professionals/careers/trainingprograms/default.stm
i'm not sure if it will be easier this year since they are making the switch to ERAS (finally! they are); i assume they will only list programs that are accepting this year...also I assume all the program are taking part in ERAS but i'm not a 100% sure? you guys will have to call around and make sure.
as to suggestions at to what helped...who knows? its such a strange process...
what helped : continued interest in the field (i did chrysalis as a med student), i was open to going everywhere (mind you this was probably one of the bigger factors, since i'm going to the midwest and i was from the north east), research (i had done a lot of basic science research in undergrad) which touched on immunology, i was involved in clinical research as a resident- i had interesting ideas but nothing accomplished
... but my take is that as long as you have some cool ideas and you can verbalize them well, people like that...they understand that we all don't have time to write tons of articles by this point...
what hurt : my residency did not have an allergy program (not only does it give you a chance to get an inhouse spot but you also tend to have bigger names write letters for you), i have no publications, the strength of your residency helps (bigger names impress people)
i applied to all 55 program that were taking (except like 2), got interviews at 5, got 2 acceptances....
my advice in the very least, get a case report done, and try to get started on an ongoing research project as early as possible (its hard, residency takes so much out of you, thats its really tough to get research time)...as all competitive residencies, a chief year helps (i didn't do one, but some of the other applicants i met in the field did)....really know the field (see it not just allergy shots, asthma, a lot of the programs emphasize immunology, basic science research, so become comfortable with it, even if you haven't done it), they obviously like more academic minded people (but realistically most do private practice), keep an eye on the latest literature (like the big studies that come out and anything new england journal)
oh most programs accept im/peds, some accept only peds...for a particular year, some only have an im spot...i was im, and at a lot of programs they like having one of each...so we can learn from each other...
i hope i answered all the questions...anything else, just ask...
good luck.