Looks like you're thinking the same thing I've been thinking. Wanna bet that as more comes out about this guy, he'll look less and less "innocent"?
1. Illegal documents/visa.
2. Sends large sums of money home to his family (larger than known income)
3. An electrician by trade... Reportedly installing security alarms in London..
4. Seen either coming from the bombers house or lived there.
5. Running like hell from police.
Could it be he was working for the terrorist helping rig the bombs?
Added more info to #3