First of all, thanks everybody for TONs of great info.. Helped me a lot.
I started commuting previous wednesday, but this was first full week. My commute is 2.5 miles one way now, but next month company I work for changes location, so I will be doing about 6 miles one way. Anxiously looking forward to that.
I must admit, riding in Houston on streets where no bike lane exists is tough.. it seems like 90% of drivers do not consider bicycle as legal vehicle, having right to take any part of their precious lane.. Throughout the week I collected nice bunch of honks, half puzzled/half angry looks and so on. Well, not my problem.
Most hassle, of course, are intersections and highway crossings with right turn lanes.. slowly getting used to. Anyway, commuting is great way to excercise and is FUN

Thanks again for such a nice place to be in!
-Mo