Yeah, as far as Spidey goes - the web shooters were really the only big thing for me, as far as the origins went. I guess the organic ones didn't bother me all that much when I actually saw the movies anyways, but it would have been cool to see it the original way. Other than that, I thought everything (costume, power set, etc.) was about perfect....well, except for the quipping/smart ass remarks. I'd like to see more of that in the Spidey reboot. Spidey is often "funny" in the comics I think (and sort of known for that), and we didn't really get that in the movies.
Anyways, back on the topic here, I hope we hear/see some more about Cap this weekend. I think it is very possible with both Cap (Chris Evans), Red Skull (Weaving), and director Joe Johnston there. Should be a fun weekend. I doubt we'll see footage, since they either just started filming or haven't quite started yet - but maybe some pics or something.