You have kids using instant messaging, and you
really need to get IMsecure Pro. Study after study indicates that kids reveal too much personal information online, and are increasingly being targeted online by adult creeps. With IMsecure Pro, you can make certain that your address, telephone number, etc. never go out through an instant message. It's as easy as typing it in to IMsecure Pro:
http://www.zonelabs.com/store/content/catalog/products/sku_list_imsp.jsp
In my opinion, the Kerio Personal Firewall is the most effective desktop firewall presently available. Kerio also allows you be assured that kids can't post private information at Live Journal, etc. It is easier for consumers to use in default than other firewalls, but the default rules are based upon Snort. Although there are two other good firewalls on the market (Outpost and Zone Alarm Pro), Kerio is on sale for $14.95 through the end of March:
http://www.sunbelt-software.com/Kerio.cfm
Get shopping Mom :)