I would say that going to interviews and seeing what other companies have to offer as well as getting interview experience only helps and educates you in your search for finding the right place to go. after interviewing, you might suprise yourself and choose to go with a company that you initially had no intentions of working for. about telling them if you've interviewed with other companies, i would tell them the truth, i'm not sure why they would hold that fact against you in determining whether or not to hire you, actually i think that getting other interviews kinda implies to them that you are infact marketable to other regionals and that company might say hey, look at this guy, other places are giving him chances, so he must have something good going for him and something good to offer their (and our) company.